diff --git a/prettify.css b/prettify.css
index 531dbb4a..6a010822 100644
--- a/prettify.css
+++ b/prettify.css
@@ -36,4 +36,5 @@
   .tag { color: #88f; font-weight: bold; }
   .atn { color: #f8f; }
   .atv { color: #8f8; }
+  .dec { color: #f8f; }
 }