fix color

Author: r0hit-gupta

src/shared/components/challenge-listing/Sidebar/BucketSelector/style.scss

@@ -4,7 +4,7 @@
   text-align: center;
 
   a {
-    color: #767676;
+    color: $tc-gray-60;
     font-size: 13px;
     line-height: 30px;
   }