diff --git a/web_src/js/features/repo-projects.js b/web_src/js/features/repo-projects.js
index 9777e6c8ecc..49af4660500 100644
--- a/web_src/js/features/repo-projects.js
+++ b/web_src/js/features/repo-projects.js
@@ -200,7 +200,7 @@ function getRelativeColor(color) {
 }
 
 function rgbToHex(rgb) {
-  rgb = rgb.match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);
+  rgb = rgb.match(/^rgba?\((\d+),\s*(\d+),\s*(\d+).*\)$/);
   return `#${hex(rgb[1])}${hex(rgb[2])}${hex(rgb[3])}`;
 }