diff --git a/mkessler-fancythm.sty b/mkessler-fancythm.sty
index bd1b836..970e9b7 100644
--- a/mkessler-fancythm.sty
+++ b/mkessler-fancythm.sty
@@ -117,7 +117,7 @@
 \RequirePackage{hyperref}
 \RequirePackage[skins]{tcolorbox}
 \RequirePackage{xcolor}
-\definecolor{gold}{rgb}{218,165,32}
+\definecolor{gold}{RGB}{218,165,32}
 
 
 \mdfsetup{skipabove=\topskip,skipbelow=\topskip}