--- a/devtools/client/themes/rules.css
+++ b/devtools/client/themes/rules.css
@@ -253,21 +253,19 @@
 .theme-firebug .ruleview-overridden .ruleview-propertyname,
 .theme-firebug .ruleview-overridden .ruleview-propertyvalue {
   text-decoration: line-through;
 }
 
 .theme-firebug .ruleview-enableproperty:not([checked]) ~ .ruleview-namecontainer,
 .theme-firebug .ruleview-enableproperty:not([checked]) ~ .ruleview-namecontainer *,
 .theme-firebug .ruleview-enableproperty:not([checked]) ~ .ruleview-propertyvaluecontainer,
-.theme-firebug .ruleview-enableproperty:not([checked]) ~ .ruleview-propertyvaluecontainer * {
-  color: #CCCCCC;
-}
-
-.theme-firebug .ruleview-enableproperty:not([checked]) ~ .ruleview-computedlist * {
+.theme-firebug .ruleview-enableproperty:not([checked]) ~ .ruleview-propertyvaluecontainer *,
+.theme-firebug .ruleview-overridden > * > .ruleview-computed:not(.ruleview-overridden),
+.theme-firebug .ruleview-overridden > * > .ruleview-computed:not(.ruleview-overridden) * {
   color: #CCCCCC;
 }
 
 .ruleview-rule + .ruleview-rule {
   border-top-width: 1px;
   border-top-style: dotted;
 }