private bool IsPrimaryColor_BlackList(String Color)
{

	// Black-list of non-primary colors
        String[] NonPrimaryColors = 
        	{   "GREEN", "PURPLE", "GREY", "BROWN",
                    "WHITE", "BEIGE", "CHARCOAL", "TAN"
                };

	for (int i = 0; i < NonPrimaryColors.Length; i++)
        {
        	if (Color.Trim().ToUpper() == NonPrimaryColors[i])
                {
                    // Not a primary coloar because it's 
                    // in our list
                    return (false);
                }
      	}

	// Color was not in our non-primary color list, so 
       	// it must be a primary color.
        return (true);
}