Use rgb(200,200,200) for selections

src/main/webapp/app/search/metadata/metadata.scss

@@ -37,7 +37,7 @@ li.selected {
   list-style-type: none;
   padding-left: 20px;
   padding-right: 20px;
-  background-color: rgba(0, 255, 0, 0.5);
+  background-color: rgb(200, 200, 200);
 }
 li.unselected {
   list-style-type: none;