From 0ccf3beec7cfddc1fdce5a6ca50ffd64f733e39c Mon Sep 17 00:00:00 2001
From: Daniel Imms <2193314+Tyriar@users.noreply.github.com>
Date: Sun, 24 Jul 2022 08:03:27 -0700
Subject: [PATCH] Retain hue when flipping luminance

Fixes #3845
---
 src/common/Color.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/common/Color.ts b/src/common/Color.ts
index e5c7e3eb..f62dd6cb 100644
--- a/src/common/Color.ts
+++ b/src/common/Color.ts
@@ -195,7 +195,7 @@ export namespace rgba {
         const resultA = reduceLuminance(bgRgba, fgRgba, ratio);
         const resultARatio = contrastRatio(bgL, rgb.relativeLuminance(resultA >> 8));
         if (resultARatio < ratio) {
-          const resultB = increaseLuminance(bgRgba, bgRgba, ratio);
+          const resultB = increaseLuminance(bgRgba, fgRgba, ratio);
           const resultBRatio = contrastRatio(bgL, rgb.relativeLuminance(resultB >> 8));
           return resultARatio > resultBRatio ? resultA : resultB;
         }
@@ -204,7 +204,7 @@ export namespace rgba {
       const resultA = increaseLuminance(bgRgba, fgRgba, ratio);
       const resultARatio = contrastRatio(bgL, rgb.relativeLuminance(resultA >> 8));
       if (resultARatio < ratio) {
-        const resultB = reduceLuminance(bgRgba, bgRgba, ratio);
+        const resultB = reduceLuminance(bgRgba, fgRgba, ratio);
         const resultBRatio = contrastRatio(bgL, rgb.relativeLuminance(resultB >> 8));
         return resultARatio > resultBRatio ? resultA : resultB;
       }