feat(utils): add isLightColor helper - #73
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- Rank colors by WCAG relative luminance, not raw RGB averages - Accept hex and numeric rgb()/rgba() strings, ignoring any alpha - Return false for unparseable input so screens keep rendering
nicomiguelino
approved these changes
Aug 12, 2026
nicomiguelino
marked this pull request as ready for review
August 12, 2026 20:38
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Adds a shared
isLightColor(color)utility so apps can pick a readable text colour against the customer's accent colour instead of hardcoding one. Customers setscreenly_color_accentthemselves, so anything painted on top of it needs to know whether the brand is pale or deep. Nothing in the library covered this and no app had rolled its own.It uses the WCAG relative luminance formula rather than averaging raw channels, so pure yellow and pure blue land on opposite sides of the threshold the way an eye sees them. Accepts hex and numeric
rgb()/rgba()strings and ignores alpha. Unparseable input returnsfalserather than throwing, so a malformed setting cannot blank an unattended screen. Minor version bump since this is additive.