diff --git a/mkessler-hypersetup.sty b/mkessler-hypersetup.sty
index fb7afc8..d0dfb4b 100644
--- a/mkessler-hypersetup.sty
+++ b/mkessler-hypersetup.sty
@@ -10,6 +10,7 @@
 
 %%%Hyperref and setup
 \RequirePackage{hyperref} % Hyperlinks
+\RequirePackage{xcolor} % To compute the colors below
 \RequirePackage{amsmath} % Cleveref needs this
 \RequirePackage{cleveref} % Better referencing
 \hypersetup{colorlinks, citecolor=violet, urlcolor=blue!80!black, linkcolor=red!50!black, pdfauthor=\@author, pdftitle=\@title}