diff --git a/css/swc.css b/css/swc.css
index 27ca4ff..06c6549 100644
--- a/css/swc.css
+++ b/css/swc.css
@@ -94,6 +94,17 @@ table.outlined {
     border-collapse: collapse;
 }
 
+/* Code sample */
+pre.sourceCode{
+    color: ForestGreen;
+}
+pre.output {
+    color: MediumBlue;
+}
+pre.error {
+    color: Red;
+}
+
 /* Printing */
 @media print {
   h1 {