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Allow high-contrast input colors to be used as-is #3209

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Merged
merged 1 commit into from
May 2, 2025
+10 −1
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Allow high-contrast input colors to be used as-is #3209

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5 changes: 5 additions & 0 deletions .changeset/rich-lamps-compare.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
"@gitbook/colors": patch
---

Change lightness check for color step 9 to allow input colors with a higher-than-needed contrast
6 changes: 5 additions & 1 deletion packages/colors/src/transformations.ts
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Expand Up @@ -214,7 +214,11 @@ export function colorScale(
const targetL =
foregroundColor.L * mapping[index] + backgroundColor.L * (1 - mapping[index]);

if (index === 8 && !mix && Math.abs(baseColor.L - targetL) < 0.2) {
if (
index === 8 &&
!mix &&
(darkMode ? targetL - baseColor.L < 0.2 : baseColor.L - targetL < 0.2)
) {
// Original colour is close enough to target, so let's use the original colour as step 9.
result.push(hex);
continue;
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