Update green colors

jet/static/jet/css/themes/green/_variables.scss

@@ -100,8 +100,8 @@ $top-icon-color: $contrast-color;
 
 $top-dropdown-background-color: $green-color-4;
 $top-dropdown-text-color: $green-color-9;
-$top-dropdown-contrast-background-color: $green-color-2;
-$top-dropdown-contrast-text-color: $green-color-9;
+$top-dropdown-contrast-background-color: $green-color-3;
+$top-dropdown-contrast-text-color: $green-color-7;
 $top-dropdown-border-color: $green-color-5;
 $top-dropdown-link-color: $green-color-9;
 $top-dropdown-hover-link-color: $green-color-9;