--- a/devtools/client/themes/eyedropper.css
+++ b/devtools/client/themes/eyedropper.css
@@ -25,16 +25,18 @@
 
 #color-value-box {
   background-color: #E0E0E0;
   border-radius: 1px;
   width: 150px;
 }
 
 #color-value {
+  /* avoid the # appearing at the end for some colours in RTL locales */
+  direction: ltr;
   padding: 0.3em;
   text-shadow: 1px 1px 1px #fff;
 }
 
 #color-value.highlight {
   font-family: inherit;
 }