color( colorName, colorDefault ) {
    // Key must be specified
    if (!(colorName && colorName.trim())) {
      return _reportError(HMSTATUS.invalidHelperUse,
        {helper: 'fontList', error: HMSTATUS.missingParam, expected: 'name'});
    } else {
      if (!GenericHelpers.theme.colors) { return colorDefault; }
      const ret = GenericHelpers.theme.colors[ colorName ];
      if (!(ret && ret.trim())) {
        return colorDefault;
      }
      return ret;
    }
  }
Return a named color value as an RRGGBB string.
  @method toFrom