fix(tabs): fix non-retina border color when tabs color and bg color are used together

scss/_tabs.scss

@@ -129,6 +129,7 @@
     &> .tabs{
       background-color: $color;
       background-image: linear-gradient(0deg, $border-color, $border-color 50%, transparent 50%);
+      border-color: $border-color;
     }
   }
 }