Java ColorRGB class

/**
 * @author Lars Gajewski @zennxd /u/Zennxd
 * Custom Color class.
 */

public class ColorRGB {
    public int r,g,b;

    //constructors
    /**
     * Creates a new Color class with the default color RED(255,  0,  0).
     */
    public ColorRGB(){
        r = 255;
        g = 0;
        b = 0;
    }
    /**
     * Creates a new Color class with custom color values.<br>
     * On creation, it checks if passed parameters are within the valid bounds.
     * @param r Amount of red in the color.
     * @param g Amount of green in the color.
     * @param b Amount of red in the color.
     * @exception IllegalArgumentException one or more of the values is less than 0 or more than 255.
     */
    public ColorRGB(int r,int g,int b){
        this.r = r;
        this.g = g;
        this.b = b;
        checkValidity();
    }
    /**
     * Creates a new Color class with a predefined color.
     * @prefabColor The color that the color values will create.
     * @see pc
     */
    public ColorRGB(pc prefabColor){
        this.r = prefabColor.r;
        this.g = prefabColor.g;
        this.b = prefabColor.b;
        checkValidity();
    }

    //methods
    /**
     * Changes the color values of the class.
     * @param r Amount of red in the color.
     * @param g Amount of green in the color.
     * @param b Amount of blue in the color.
     */
    public void changeColor(int r, int g, int b){
        this.r = r;
        this.g = g;
        this.b = b;
        checkValidity();
    }
    /**
     * Checks if the color values are within valid bounds.
     * @exception IllegalArgumentException They're not.
     * @see changeColor
     * @see Constructors
     */
    public void checkValidity(){
        int[] colorValues = new int[]{r,g,b};
        char[] colorValueNames = new char[]{'r','g','b'};

        for(int i = 0; i < 3; i++){
            if(colorValues[i] < 0 || colorValues[i] > 255){
              IllegalArgumentException e = new IllegalArgumentException
              ("Color not valid. Color value " + colorValueNames[i] + " must be between 0 and 255."
                      + "current value:" + colorValues[i] + ".");
              throw e;
            }
        }
    }
    public void PrintColorValues(){
        System.out.println("Color Values of color " + this + ":");
        System.out.println("    R: " + r);
        System.out.println("    G: " + g);
        System.out.println("    B: " + b);
    }

    //Custom Color enum: prefabColor
    public enum pc{
        RED     (255, 0  , 0  ),
        GREEN   (0  , 255, 0  ),
        BLUE    (0  , 0  , 255),
        WHITE   (255, 255, 255),
        BLACK   (0  , 0  , 0  ),
        YELLOW  (255, 255, 0  ),
        PURPLE  (255, 0  , 255),
        ORANGE  (255, 140, 0  ),
        CYAN    (0  , 255, 255);

        private final int r;
        private final int g;
        private final int b;

        pc(int r, int g, int b){
            this.r = r;
            this.g = g;
            this.b = b;
        }
    }
}