Update color-helpers.html

docs/documentation/modifiers/color-helpers.html

@@ -56,7 +56,7 @@ doc-subtab: color-helpers
       </tbody>
     </table>
     
-    {% assign vernum = site.version | replace: "." "" | plus: 1 | minus: 1 %}
+    {% assign vernum = site.version | downcase | remove: "." | plus: 0 %}
 
     {% if vernum >= 63 %}