Pen Display Color Accuracy for Web and CSS Work

Pen Display Color Accuracy for Web and CSS Work

Drawing displays sold to illustrators cover far more than sRGB. The Wacom Cintiq Pro 27, Huion Kamvas Pro 19 and XP-Pen Artist Pro 27 all list close to full DCI-P3 and Adobe RGB coverage, and the iPad Pro M4 targets P3 as well. That range is a gift for print and illustration work and a trap for web work, because most of your visitors still see the page on an sRGB screen.

The gap shows up the moment you hand a color to CSS. A saturated green you mixed on the tablet can sit outside sRGB, so the HEX code your design app exports is already a duller approximation of what you saw. Each section below covers one display: its published gamut and calibration, the settings or color profile that put it into an sRGB-like mode, and how to move a sampled color into HEX, RGB or oklch() without surprises.

Wacom Cintiq Pro 27 Color Accuracy

The Wacom Cintiq Pro 27 is a wide-gamut display.¹

Its 98% DCI-P3 and 99% Adobe RGB gamut coverage means you can see colors on this tablet that a standard sRGB monitor cannot display. For CSS and web design work, this creates an important discrepancy: colors you draw or adjust on the Cintiq Pro 27 may look more vivid there than they will appear on the sRGB screens of your users. Understanding where the sRGB boundary sits relative to what the tablet can display is the foundation of a color-accurate web workflow on this device.

Consequently, exporting a color from the Cintiq Pro 27 gives you the sRGB-clamped representation of that color, whether the export is a HEX value from a design tool or an eyedropper sample. If the original was outside the sRGB gamut, the exported HEX will be a duller approximation. Building on this, always proof web deliverables on an sRGB-calibrated display or with your graphics software's soft-proofing set to sRGB, not on the Cintiq itself.

Specifications¹

The Cintiq Pro 27 as a primary web color workstation

The Wacom Cintiq Pro 27 is the largest and highest-resolution display in this batch: 27 inches at 3840 × 2160, giving 163 PPI. Its 98% DCI-P3 and 99% Adobe RGB coverage means it can render nearly the entire P3 gamut.² For web color work, this makes it both the most capable and the most misleading display in a designer's setup. Colors look their best on this screen, which is exactly the problem: they will not look this good for most of your users.

Setting up the Cintiq Pro 27 as a reliable web color workstation requires deliberate configuration. Assign the sRGB IEC61966-2.1 profile in your OS display settings. Enable soft-proofing in your design tool. Set your document color space to sRGB. These three steps transform the Cintiq Pro 27 from a wide-gamut preview device into an accurate sRGB reference display. Building on this, the Wacom Color Manager software included with the tablet lets you switch between color profiles quickly, so you can toggle between sRGB (for web work) and P3 (for print or wide-gamut preview) without recalibrating each time.

4K resolution and CSS pixel evaluation

At 163 PPI and 4K resolution, the Cintiq Pro 27 lets you evaluate CSS colors at or near actual pixel size without excessive zooming. This is useful for checking how anti-aliased text renders against a background color, how sub-pixel rendering affects perceived color at small sizes, and whether a color contrast ratio holds up at the pixel level. For WCAG contrast checks, the Cintiq Pro 27's resolution gives you confidence that the colors you approve will render correctly on other high-DPI displays, not just on your specific hardware.

The high pixel density also makes subtle gradient banding easier to spot, because banding shows up as visible steps in smooth color transitions at this resolution. Catching banding in a CSS gradient on the Cintiq means you can add a dithering step or lighten the gradient before the asset reaches lower-DPI screens where the problem would be worse. Reviewing at native resolution therefore catches color artifacts that a compressed preview on a laptop would hide entirely.

Wacom Color Manager and ICC profile workflows for CSS

Wacom Color Manager is the utility included with the Cintiq Pro 27 for managing display color profiles. It reads the factory calibration data stored in the display's EDID and applies it as an ICC profile.³ For web color work, you can use Wacom Color Manager to create a custom sRGB profile that clamps the display output to the sRGB gamut while preserving the factory calibration's white point accuracy.

The workflow is: open Wacom Color Manager, select the Cintiq Pro 27, choose "Custom" profile type, set the target color space to sRGB, and let the software build the profile. This profile maps the panel's native wide gamut to sRGB, ensuring that every sRGB value you send to the display renders accurately without gamut expansion. Building on this, switch to this profile before starting any web design session. If you need to preview P3 colors, switch back to the factory P3 profile. The profile switch takes a few seconds and does not require a display restart.

Hardware calibration versus factory calibration

The factory calibration on the Cintiq Pro 27 holds the display to ΔE < 2 across the sRGB gamut. For most web design work, this is sufficient. If you need tighter tolerance (for example, if you are matching brand colors to a specific Pantone reference), a hardware colorimeter can build a custom profile that corrects for unit-to-unit variation and panel aging. The X-Rite i1Display Pro and Datacolor SpyderX both support the Cintiq Pro 27. Recalibrate every 200 to 300 hours of active use, or accept the factory profile for general web work where exact brand color matching is not critical.

Converting Cintiq Pro 27 colors to CSS: a practical pipeline

A reliable color conversion pipeline from the Cintiq Pro 27 to CSS output has four steps. First, ensure the display is in sRGB mode (via ICC profile or Reference Mode equivalent). Second, work in an sRGB document in your design tool with soft-proofing enabled. Third, sample the color using a tool that reports sRGB values (the design tool's eyedropper, not a screen capture utility that may apply the display profile). Fourth, paste the HEX or RGB value into this converter to see how a tablet color converts to sRGB and get the OKLCH, HSL, or other CSS format you need.

This pipeline eliminates the gamut mismatch problem at every step. The display shows sRGB, the document is sRGB, the sampler reads sRGB, and the converter assumes sRGB input. Building on this, if you skip any step (for example, if you sample a color while the display is in P3 mode), the HEX value you get is the sRGB-clamped version of a P3 color, which may look noticeably different from what you saw on screen. CSS makes that boundary explicit: HEX and rgb() resolve to sRGB, while a wide-gamut color has to be written as color(display-p3 …), because component values outside the sRGB bounds are valid but out of gamut for that space.⁴ The converter cannot detect or correct a sampling mistake: it processes the numeric values you give it, not the visual appearance of the color on your specific display.

Using the Cintiq Pro 27 for accessible color design

Wacom describes the panel as Pantone Validated and Pantone SkinTone Validated, with presets for the color spaces used in web, print, photography, and video work, plus HDR Gamma support.⁵ That validation is worth knowing when you judge a color here: a display can be accurate to a print reference and still be far wider than the sRGB web target, which is exactly the gap this converter exposes.

The Cintiq Pro 27's size and resolution make it well-suited for accessible color design. You can display a full webpage mockup at actual size alongside a WCAG contrast checker, evaluating color pairs in context rather than as isolated swatches. The 27-inch panel gives you enough screen real estate to see the entire design and the contrast data simultaneously. For designers who need to meet WCAG 2.1 AA compliance, this side-by-side workflow is more efficient than toggling between tools on a smaller display.

Huion Kamvas Pro 19 Color Accuracy

The Huion Kamvas Pro 19 is a wide-gamut drawing display.¹

Its 96% Adobe RGB and 98% DCI-P3 gamut coverage places it well beyond the sRGB range that most web browsers render by default. For web design and CSS work, this matters because your eye adapts to the wider color range of the tablet. Colors that look correct on the Kamvas Pro 19 may appear desaturated to users viewing the same page on a standard sRGB monitor.

Building on this, the critical practice for web-targeted work on this display is soft-proofing. Set your design tool to simulate sRGB output before sampling or exporting colors. Furthermore, any color you export to HEX from an application running in its native Adobe RGB or P3 mode represents the sRGB-clipped version of that color. If the source was highly saturated, the export will be noticeably duller in CSS.

Specifications¹

The Kamvas Pro 19 gamut and its effect on web color decisions

The Huion Kamvas Pro 19 covers 96% of Adobe RGB and 98% of DCI-P3, placing it firmly in wide-gamut territory.² For web design work, this means the tablet can display colors that no HEX code or rgb() value can fully represent. When you adjust a color on the Kamvas Pro 19 and it looks right, you are seeing a version of that color that will appear less vivid on the sRGB screens used by the majority of web users.

This gamut gap is not uniform across the color space. Blues and greens show the largest visible difference between the Kamvas Pro 19 and an sRGB monitor. Reds are closer to the sRGB boundary, so red-heavy palettes show less discrepancy. Building on this, if your web design work involves saturated blues, teals, or greens, the Kamvas Pro 19 will show you a misleading preview of how those colors will look in production unless you soft-proof to sRGB first.

Adobe RGB versus DCI-P3: which gamut matters for CSS

The Kamvas Pro 19 covers both Adobe RGB and DCI-P3, but these two gamuts extend in slightly different directions. Adobe RGB reaches deeper into the cyan-green region, while DCI-P3 extends further into saturated reds and magentas. CSS color(display-p3 …) targets the DCI-P3 gamut, not Adobe RGB. If you design in an Adobe RGB document mode and export P3 CSS values, the cyan-green colors will not map correctly because the source gamut and the target gamut do not align.

For CSS work, set your design tool to Display P3 mode rather than Adobe RGB when working on the Kamvas Pro 19. This ensures the colors you see map directly to the CSS color(display-p3 …) space. If your tool only offers Adobe RGB, the gamut mismatch is small enough that most colors will still look correct, but saturated cyans and greens may appear slightly different in CSS than they do on the tablet.

Setting up the Kamvas Pro 19 for sRGB-locked web design

Configuring the Kamvas Pro 19 for accurate sRGB web work requires changes at two levels: the operating system and the design application. At the OS level, assign the sRGB IEC61966-2.1 profile to the tablet in your display settings. On Windows, this is in Color Management under device settings. On macOS, open Displays in System Settings and select the sRGB profile from the color profile dropdown.

At the application level, set your document color space to sRGB and enable soft-proofing. In Photoshop, View > Proof Colors (Ctrl+Y) toggles the sRGB simulation. In Affinity Photo, View > Soft Proof does the same. With soft-proofing enabled, the Kamvas Pro 19 shows you the sRGB-clipped version of every color, which is what users on standard monitors will see. Building on this, keep soft-proofing on at all times during web design work on this tablet. Turning it off even briefly risks adjusting colors based on the wider gamut preview, which will look wrong when viewed in sRGB.

The 4K resolution and pixel-level color work

The Kamvas Pro 19's 3840 × 2160 resolution gives you approximately 209 pixels per inch on its 18.4-inch panel. This is a high enough density that individual pixels are difficult to distinguish at normal viewing distance, making it well-suited for pixel-level color work such as inspecting anti-aliased edges or verifying sub-pixel rendering. For color accuracy evaluation, the key factor is not PPI but the factory calibration and gamut coverage. Huion states the panel is hardware calibrated to ΔE < 1.5 with a 2.2 gamma and ships a factory calibration report, so the colors you see at any zoom level should match their intended targets to that tolerance.³

Converting colors from the Kamvas Pro 19 to CSS OKLCH

OKLCH is the most perceptually uniform CSS color format, and it is the recommended space for design tokens in Tailwind CSS v4 and modern CSS Color Level 4 workflows. Converting a color from the Kamvas Pro 19 to OKLCH requires first ensuring the color is in sRGB space (via soft-proofing or sRGB document mode), then running the sRGB-to-OKLCH conversion to produce OKLCH coordinates for CSS tokens.

The pipeline runs through four intermediate spaces: sRGB linearization (undoing the gamma curve), XYZ-D65 transformation (device-independent space), OKLab conversion (Ottosson's perceptual model), and polar coordinate extraction (L, C, H).⁴ Each step is a fixed matrix multiplication or trigonometric function, so the conversion is deterministic. Building on this, the OKLCH values you get from this converter are the perceptually uniform coordinates of the sRGB-clamped version of your color, not the wider-gamut version the Kamvas Pro 19 can display.

Why OKLCH coordinates from a wide-gamut display need verification

If you sample a color from the Kamvas Pro 19 while it is displaying in P3 mode and paste the HEX into an OKLCH converter, the result is the OKLCH coordinates of the sRGB-clamped version. The HEX value already lost the P3 gamut information during sampling. To get the OKLCH coordinates of the actual P3 color, you need to sample the raw RGB values from a P3-aware color picker and convert those through the P3-to-OKLCH pipeline, which is different from the sRGB-to-OKLCH pipeline. Most browser-based converters, including this one, assume sRGB input unless you specify otherwise.

Long-term calibration stability and web color consistency

The Kamvas Pro 19 ships with factory calibration at ΔE < 2, but display panels drift as the backlight ages. White point shift is the most common form of drift: the blue LED in the backlight ages faster than the phosphor, causing the white point to warm over time. For web color work, a shifting white point means all colors appear slightly different after months of use, even if the gamut coverage remains stable.

CSS makes the target gamut explicit here as well: writing color(display-p3 …) targets the DCI-P3 space, and component values beyond that space's bounds are valid but out of gamut, so the browser gamut-maps them rather than clipping the way an sRGB HEX export would.⁵ Recalibrate every 200 to 300 hours of active use with a hardware colorimeter. If you do not have a colorimeter, a practical workaround is to compare a known sRGB reference image (a browser screenshot of a color checker chart) between the Kamvas Pro 19 and a calibrated sRGB monitor. Visible differences in the white point or saturated color patches indicate the tablet has drifted beyond acceptable tolerance.

Document your calibration schedule and keep a reference screenshot of your last known-good calibration state so you can detect drift early rather than discovering it after shipping incorrect colors to production. One practical approach is to use the Kamvas Pro 19 primarily for drawing and layout work while doing final color decisions on a standard sRGB display. The tablet's wide gamut is an advantage for illustration and concept work where color vibrancy matters, but for CSS color accuracy, a calibrated sRGB monitor gives you a more honest preview of what your users will actually see.

XP-Pen Artist Pro 27 Color Accuracy

The XP-Pen Artist Pro 27 is a 27-inch wide-gamut drawing display.¹

Its 97% DCI-P3 and 99% Adobe RGB gamut coverage makes it capable of rendering colors that standard sRGB monitors cannot display. This matters for web designers who need to know which colors on this panel will survive the journey to sRGB CSS without visible saturation loss.

Yet for standard web design work, the wide gamut creates a monitoring hazard: if your OS assigns the Artist Pro 27 a P3 or Adobe RGB display profile and your design tool does not soft-proof to sRGB, the colors you see and the colors users see will differ significantly for any highly saturated values. Understanding the display's profile and configuring your software correctly for the target output space is the prerequisite for accurate web color work on this device.

Specifications¹

Why the Artist Pro 27 gamut matters for CSS color accuracy

Wide-gamut displays reveal a hidden problem in web color workflows. The XP-Pen Artist Pro 27 can render 97% of DCI-P3, which means it shows colors roughly 25% more saturated than the sRGB space your HEX codes and rgb() values target.² When you adjust a color on this tablet and it looks vivid and correct, you are seeing a version of that color that most of your users cannot see on their standard monitors.

Consequently, a color that appears perfectly balanced on the Artist Pro 27 may look noticeably desaturated on an sRGB display. This mismatch is most visible in the blue and green channels, where the P3 gamut extends farthest beyond sRGB. Soft-proofing to sRGB inside your design tool before exporting any CSS value is the only reliable way to ensure the HEX code you copy matches what the majority of your audience will see.

Soft-proofing versus native gamut workflows

Two approaches exist for managing this discrepancy. The conservative path sets your design tool to sRGB mode and uses the Artist Pro 27 as if it were a standard monitor: every color you see is within the sRGB gamut, and no surprise desaturation occurs on export. The advanced path designs in P3 space and uses CSS color(display-p3 …) to serve wider colors to P3-capable browsers, with sRGB fallbacks for older displays. The Artist Pro 27 supports both workflows, but you must choose one explicitly rather than letting your OS color profile decide.

Choosing the conservative sRGB path also keeps your token pipeline simple, because every value you export maps directly to a standard HEX or oklch() token without a separate P3 branch. The advanced path is worth it only when vivid color is a product feature rather than a preview artifact. Either way, the decision should live in your design tool settings, not in the display profile, so the tablet cannot silently switch gamuts underneath you mid-project.

ICC profiles and OS-level color management on the Artist Pro 27

The XP-Pen Artist Pro 27 ships with factory calibration data, but your operating system decides how to apply it. Windows assigns the display an ICC profile that maps the panel's native gamut to the working color space of each application. macOS handles this through ColorSync, which reads the profile embedded in the display's EDID and applies it system-wide.³ If your OS assigns a wide-gamut profile and your design tool does not soft-proof, you are designing in P3 while thinking you are designing in sRGB.

Checking which profile your OS assigned is straightforward. On Windows, open Color Management and look at the profile listed for the Artist Pro 27. On macOS, open Displays in System Settings and check the color profile dropdown. For sRGB-targeted web work, assign the sRGB IEC61966-2.1 profile to the tablet. This clamps the display's output to the sRGB gamut, ensuring that what you see matches what users on standard monitors see. Factory calibration holds the display to ΔE < 1 out of the box, but panel drift accumulates over time. A hardware colorimeter from X-Rite (i1Display Pro) or Datacolor (SpyderX) measures the actual output and builds a corrected ICC profile.⁴ Recalibrate periodically for color-critical web design work, or accept the factory profile for casual use where exact color matching is not essential.

Converting P3 colors to sRGB HEX for CSS output

When a color you designed on the Artist Pro 27 falls outside the sRGB gamut, converting it to HEX requires gamut mapping: the process of finding the closest in-gamut color. Different gamut mapping strategies produce different results. Perceptual rendering compresses the entire P3 range into sRGB, preserving relative color relationships at the cost of overall saturation. Relative colorimetric rendering maps in-gamut colors exactly and clips out-of-gamut colors to the nearest boundary, preserving accuracy for colors that already fit within sRGB.⁵

Most design tools default to perceptual rendering when converting from P3 to sRGB. This is the safer choice for brand colors because it preserves the visual relationship between palette steps. Relative colorimetric is better when you have a specific sRGB target and need to tell whether a color falls outside sRGB. Building on this, the converter on this tool performs the mathematical conversion without gamut mapping strategy selection: it converts the numeric values directly. If your source color is outside sRGB, the HEX output is the clipped result, which may look noticeably different from what you see on the Artist Pro 27.

Using color(display-p3 …) in production CSS

CSS Color Level 4 allows you to serve P3 colors directly to browsers that support the syntax: color(display-p3 0.85 0.45 0.12). Safari 15.4+, Chrome 111+, and Firefox 113+ all render these values at full P3 gamut. On the Artist Pro 27, Safari displays these colors at their intended saturation. On sRGB displays, the browser clamps to the nearest in-gamut color automatically. This progressive enhancement approach lets you use the full gamut of the Artist Pro 27 for users with P3 screens while maintaining acceptable fallback for everyone else.⁶

Color picker libraries and HSV values on wide-gamut displays

Most JavaScript color picker libraries operate in sRGB space internally. When you initialize a picker with an HSV value, the library converts that value to sRGB for display. On the Artist Pro 27, the browser then renders that sRGB value through the display's color profile, which may expand it to fill more of the P3 gamut than intended. The result is a color picker that looks more saturated on the tablet than it would on a standard monitor.

This matters when you are using a color picker to select a CSS value on the Artist Pro 27. The value the picker reports (in HEX or RGB) is correct in sRGB space, but the visual feedback you see on screen is the P3-expanded version. Trust the numeric output of the picker, not your eyes, when selecting colors for sRGB CSS. Building on this, if you are building a color picker component that needs to display accurately on wide-gamut screens, use the color() CSS function with explicit color space coordinates rather than relying on the browser to interpret sRGB values through the display profile.

Calibrating your workflow, not just your display

The most reliable web color workflow on the Artist Pro 27 combines three practices: assign an sRGB ICC profile to the display in your OS, enable soft-proofing in your design tool, and verify exported HEX values on a secondary sRGB monitor or using a browser-based gamut checker. No single step is sufficient on its own. The profile ensures the OS renders sRGB correctly, soft-proofing shows you the sRGB-clipped version in your tool, and the secondary check catches any remaining discrepancies before the color reaches production CSS.

Apple iPad Pro M4 Color Accuracy

The Apple iPad Pro M4 ships with a Liquid Retina XDR display covering 100% DCI-P3¹.

Every application on the iPad that manages colors correctly can render colors that are more vivid than anything displayable in standard sRGB, the color space underlying all HEX codes and most CSS color values. Procreate, Adobe Fresco, and Affinity Designer for iPad all support this wider gamut.

For designers using the iPad Pro M4 as a primary design device, this wide-gamut display is both a capability and a monitoring challenge. Highly saturated colors look correct on the iPad screen but may appear dull on the sRGB monitors of users who view the finished website. Furthermore, Safari on iPad Pro M4 renders P3 CSS colors (color(display-p3 …)) at full gamut², making the device an accurate preview target for wide-gamut web experiences. Building on this, using the iPad as a P3 preview device while designing sRGB-safe fallbacks covers both audiences in one workflow.

Specifications¹

True Tone and its impact on color-critical iPad work

Apple's True Tone feature shifts the iPad Pro M4's white point to match the color temperature of ambient light. In a warm room (incandescent lighting at 2700K), the display adds a yellow cast. In a cool room (daylight at 6500K), it shifts toward blue. This makes the screen feel more natural for reading, but it destroys color accuracy for design work. A white background that should be #ffffff becomes slightly warm or cool depending on your environment.

Disabling True Tone is the first step for any color-critical work on the iPad Pro M4. Go to Settings > Display & Brightness and toggle True Tone off. Building on this, also disable Night Shift (which applies a similar warm shift on a schedule) and set the display brightness to a consistent level. Brightness affects perceived color: at low brightness, colors appear less saturated, and at maximum brightness, the tandem OLED panel can display HDR content at 1600 nits, which changes the perceived contrast ratio of your colors.

Reference Mode and professional color workflows

iPadOS 16 and later includes Reference Mode, which locks the display to a specific color space and white point (D65). For web design, select the sRGB reference mode to clamp the iPad Pro M4's output to the sRGB gamut. This eliminates the P3 preview problem entirely: colors you see in sRGB Reference Mode match what users on standard monitors see. Reference Mode disables True Tone, Auto-Brightness, and Night Shift automatically³. If your workflow requires P3 preview (for designing P3-enhanced CSS), do not use Reference Mode; instead, rely on soft-proofing in your design app.

Reference Mode also makes the iPad a fair comparison device when you are checking a layout against a desktop monitor. With the white point and gamut pinned to sRGB, a screenshot sent from your Mac renders the same on both screens, which removes the guesswork from cross-device review. That stability is why Reference Mode is the right default for any iPad color work where the final audience is on standard sRGB displays rather than on P3-capable hardware.

Designing P3 CSS colors on the iPad Pro M4

Safari on iPad Pro M4 renders color(display-p3 …) at full P3 gamut, making the device one of the most accurate P3 preview targets available. When you write color(display-p3 0.85 0.45 0.12) in your CSS and view it in Safari on this iPad, you see the color at its intended saturation. On an sRGB display, the browser clamps to the nearest in-gamut color. This progressive enhancement approach is the correct pattern for P3 CSS: design on a P3 display, test on an sRGB display, and let the browser handle the fallback.

Procreate on iPad uses the P3 color space natively⁴. When you paint with a saturated blue in Procreate, the app stores that color in P3 coordinates. Copying the color as HEX from Procreate gives you the sRGB-clamped version, which looks duller than what you painted. To preserve the P3 coordinates, use Procreate's color panel to read the raw RGB values and construct the color(display-p3 r g b) CSS value manually. Building on this, Affinity Designer for iPad allows importing custom P3 ICC profiles for wide-gamut workflows⁵, though it does not expose P3 as a built-in document mode in its preferences.

The 1600-nit HDR peak and SDR color accuracy

The iPad Pro M4's tandem OLED panel peaks at 1600 nits for HDR content, while SDR (standard dynamic range) content renders at up to 1000 nits full-screen. CSS colors are SDR content. When you are evaluating CSS colors on the iPad Pro M4, the display is operating in SDR mode, and the color accuracy specifications apply to that mode. The 1600-nit HDR capability does not affect CSS color rendering, but it does mean the display's behavior in HDR video content (which may use P3 or Rec2020) is different from its behavior in SDR web content.

Exporting colors from iPad design apps to CSS formats

The iPad design app ecosystem handles color export differently from desktop tools. Procreate copies colors as sRGB HEX. Affinity Designer for iPad can export in multiple color spaces but defaults to the document profile. Adobe Fresco works with the iPad Pro M4's wide-gamut display and can be set to sRGB document mode for CSS-safe output. When your goal is CSS output, set the document to sRGB mode before exporting colors to avoid gamut conversion surprises.

For OKLCH output (needed for Tailwind v4 design tokens), no iPad design app exports OKLCH directly. Export the color as sRGB HEX or RGB, then turn the exported color into an OKLCH token. The sRGB-to-OKLCH pipeline is deterministic, so the OKLCH coordinates you get from a HEX value are the same regardless of which app produced that HEX. Building on this, if you are building a design-to-code workflow on the iPad, consider using a Shortcuts automation that takes a HEX value from the clipboard, runs it through a conversion API or local JavaScript, and outputs the OKLCH coordinates for your Tailwind config.

Using the iPad Pro M4 as a P3 preview device in a multi-screen workflow

The most effective use of the iPad Pro M4 in a web color workflow is as a dedicated P3 preview device. Design your colors on a calibrated sRGB monitor (your primary display), then check how they look in P3 by opening the same page in Safari on the iPad. Colors that look good in both sRGB and P3 are safe for production. Colors that look significantly different need explicit P3 CSS declarations with sRGB fallbacks. This two-device workflow is more reliable than trying to do all color work on the iPad alone, because it forces you to see both gamut contexts before committing to a color value.