LGTM2
I can see how forced-color mode will always be a heuristic, but this
change seems reasonable, and if it is requested I trust those people to
know what they need.
/Daniel
On 2025-12-03 03:05, TAMURA, Kent wrote:
LGTM1.
This looks a reasonable behavior change, and compatibility impact
would be small.
On Thu, Nov 27, 2025 at 11:25 PM 'Sejal Anand' via blink-dev
<[email protected]> wrote:
*Contact emails*
[email protected]
*Specification*
https://drafts.csswg.org/css-color-adjust-1/#forced-colors-properties
*Summary*
This change updates Chromium’s emoji rendering behavior in Forced
Colors Mode. During computed-value resolution, emoji whose
font-variant-emoji value computes to normal or unicode are
rendered using their monochrome glyphs when available.
Chromium will therefore suppress color emoji rendering, which
ensures emojis fully participate in the Forced Colors Mode
pipeline and respect system high-contrast colors. Behavior outside
forced colors mode is unchanged.
*Blink component*
Blink>Fonts
<https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EFonts%22>
*Web Feature ID*
forced-colors <https://webstatus.dev/features/forced-colors>
*Motivation*
Forced Colors Mode (High Contrast Mode) is designed to improve
readability for visually impaired users by applying system-defined
high-contrast colors across all content. However, colorful emoji
do not adapt to these enforced colors. They often retain their
original multicolor appearance, which can make them blend into the
background, appear low-contrast, or become visually distracting.
This undermines the purpose of the mode and creates inconsistent
accessibility behavior compared to the rest of the text rendering
pipeline.
To address this, Chromium now ensures that in Forced Colors Mode,
at computed-value time, any emoji whose font-variant-emoji value
resolves to normal or unicode will render using a monochrome
variant when available. This makes emoji follow the same contrast
and color constraints as surrounding text, improves readability,
and aligns emoji rendering with user expectations for
high-contrast environments.
*Initial public proposal*
https://github.com/w3c/csswg-drafts/issues/8064
*TAG review*
https://github.com/w3ctag/design-reviews/issues/1156
*TAG review status*
Issues addressed
*Risks*
*Interoperability and Compatibility*
This will change emoji font rendering for web pages when in Forced
Colors Mode, but no major interoperability or compatibility issues
are anticipated.
/Gecko/: No
signal (https://github.com/mozilla/standards-positions/issues/1323)
/WebKit/: No signal Forced color mode is not entirely supported in
Apple systems.
/Web developers/: Positive Four users have reported being affected
by this issue: https://issues.chromium.org/issues/420857717
/Other signals/:
*WebView application risks*
/Does this intent deprecate or change behavior of existing APIs,
such that it has potentially high risk for Android WebView-based
applications?/
/No information provided/
*Debuggability*
Existing DevTools capabilities already cover this.
*Will this feature be supported on all six Blink platforms
(Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?*
Yes
*Is this feature fully tested by **web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>**?*
Yes
https://wpt.fyi/results/forced-colors-mode/forced-colors-mode-57.html?label=master&label=experimental&aligned
<https://wpt.fyi/results/forced-colors-mode/forced-colors-mode-57.html?label=master&label=experimental&aligned>
Https://wpt.fyi/results/forced-colors-mode/forced-colors-mode-58.html?label=master&label=experimental&aligned
<https://wpt.fyi/results/forced-colors-mode/forced-colors-mode-58.html?label=master&label=experimental&aligned>
Https://wpt.fyi/results/forced-colors-mode/forced-colors-mode-59.html?label=experimental&label=master&aligned
<https://wpt.fyi/results/forced-colors-mode/forced-colors-mode-59.html?label=experimental&label=master&aligned>
https://wpt.fyi/results/forced-colors-mode/forced-colors-mode-60.html?label=experimental&label=master&aligned
<https://wpt.fyi/results/forced-colors-mode/forced-colors-mode-60.html?label=experimental&label=master&aligned>
*Flag name on about://flags*
/No information provided/
*Finch feature name*
EmojiMonochromeRendering
*Rollout plan*
Will ship enabled for all users
*Requires code in //chrome?*
False
*Tracking bug*
https://issues.chromium.org/issues/420857717
*Estimated milestones*
Shipping on desktop
144
Shipping on Android
144
Shipping on WebView
144
Shipping on iOS
144
*Anticipated spec changes*
/Open questions about a feature may be a source of future web
compat or interop issues. Please list open issues (e.g. links to
known github issues in the project for the feature specification)
whose resolution may introduce web compat/interop risk (e.g.,
changing to naming or structure of the API in a
non-backward-compatible way)./
None
*Link to entry on the Chrome Platform Status*
https://chromestatus.com/feature/5861138256494592?gate=6515528338374656
This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.
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TAMURA Kent
Software Engineer, Google
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