public String ReturnColor(Card.cardColor color)
    {
        String colorVal = null; 
        
        switch(color)
        {
            case RED: colorVal = REDCOLOR; 
                      break;
            case BLUE: colorVal = BLUECOLOR; 
                       break;
            case GREEN: colorVal = GREENCOLOR;
                       break;
            case YELLOW: colorVal = YELLOWCOLOR; 
                       break;
        }
        return colorVal; 
    }