mdn/content

relative colors when origin is beyond gamut of output

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#32,704 opened on Mar 15, 2024

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Content:CSShelp wanted

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Description

Once the PR https://github.com/mdn/content/pull/32004 is merged, but we should address the following :

What happens if you do a relative color with the origin color being outside the gamut of the function? For example, if you use a custom property of a fantastically vibrant magenta using oklab() and add opacity using rgb() as the output. In this case, only the alpha value changed, but I assume the origin color is converted to color(srgb) rather than rgb(), which doesn't matter in the alpha case, but does matter if the value of b is changed.

Originally posted by @estelle in https://github.com/mdn/content/pull/32004#discussion_r1525364837

Contributor guide

Research direction
Investigate the CSS Color Level 4 specification regarding relative color syntax and out of gamut origin colors, and document the behavior for MDN Web Docs.
Tech stack
None
Domain
documentation
Issue type
Documentation
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Needs investigation
Prerequisites
CSS color functions
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50