diff --git a/core/theme/deuteranopia.js b/core/theme/deuteranopia.js
index 05b4c9664..dc6d2e21f 100644
--- a/core/theme/deuteranopia.js
+++ b/core/theme/deuteranopia.js
@@ -34,7 +34,7 @@ Blockly.Themes.Deuteranopia = {};
 Blockly.Themes.Deuteranopia.defaultBlockStyles = {
   "colour_blocks": {
     "colourPrimary": "#f2a72c",
-    "colourSecondary": "#f1c170",
+    "colourSecondary": "#f1c172",
     "colourTertiary": "#da921c"
   },
   "list_blocks": {