Clean up colour resolver

src/client/ClientDataResolver.js

@@ -354,6 +354,7 @@ class ClientDataResolver {
    */
 
   /**
+   * Resolves a ColorResolvable into a color number
    * @param {ColorResolvable} color Color to resolve
    * @returns {number} A color
    */
@@ -363,11 +364,13 @@ class ClientDataResolver {
     } else if (color instanceof Array) {
       color = (color[0] << 16) + (color[1] << 8) + color[2];
     }
+
     if (color < 0 || color > 0xFFFFFF) {
       throw new RangeError('Color must be within the range 0 - 16777215 (0xFFFFFF).');
     } else if (color && isNaN(color)) {
       throw new TypeError('Unable to convert color to a number.');
     }
+
     return color;
   }
 
@@ -376,7 +379,7 @@ class ClientDataResolver {
    * @returns {number} A color
    */
   resolveColor(color) {
-    return ClientDataResolver.resolveColor(color);
+    return this.constructor.resolveColor(color);
   }
 }