Two Classes - How To Use Members Of Color Class Without Using Extends

I have two classes in two different files.

Color.java and Light.java

The Color class:

public class Color {
private int red;
private int green;
private int blue;
public Color(){
red = 0;
green = 0;
blue = 0;
}

And i have the Light class :

public class Light {
private Color color1;
private boolean switchedon;

public Light(int red, int green, int blue){
//dont know what to write here . how can i use the members of the Color class here ? without using extends.
}
}