[ECOM-7520] Fix Low Color Contrast

lms/static/sass/elements/_controls.scss

@@ -147,7 +147,7 @@
   color: $white;
 
   &:hover, &:active, &:focus {
-    background: $m-blue-d1;
+    background: $uxpl-blue-hover-active;
     color: $white;
   }
 
@@ -203,7 +203,7 @@
   color: $white;
 
   &:hover, &:active, &:focus {
-    background: $m-green-s1;
+    background: $uxpl-green-hover-active;
     color: $white;
   }
 

lms/static/sass/views/_verification.scss

@@ -1143,7 +1143,7 @@
       padding: ($baseline/2) ($baseline*1.5);
       background: white;
       text-align: center;
-      color: $m-gray-l2;
+      color: $gray-d2;
     }
   }