diff --git a/themes/default/highlights/_highlights.scss b/themes/default/highlights/_highlights.scss
index 61306d0..c578abb 100644
--- a/themes/default/highlights/_highlights.scss
+++ b/themes/default/highlights/_highlights.scss
@@ -1,10 +1,10 @@
 .r6o-annotation {
-  background-color:#ffa50033;
+  background-color:rgba(255, 165, 0, 0.2);
   border-bottom:2px solid orange;
   cursor:pointer;
 }
-      
+
 .r6o-selection {
-  background-color:#cfcfffa1;
+  background-color:rgba(207, 207, 255, 0.63);
   cursor:pointer;
-}
\ No newline at end of file
+}