diff --git a/src/common/lib/header.tex b/src/common/lib/header.tex
index 5d4e31a..092c304 100644
--- a/src/common/lib/header.tex
+++ b/src/common/lib/header.tex
@@ -62,3 +62,7 @@
     contents={Draft}
   }
 }{}
+
+% Highlight colour
+\usepackage{soul}
+\sethlcolor{magenta}