How to darken a given color (int)

Question

I have a function that takes a given color and I would like it to darken the color (reduce its brightness by 20% or so). I can\'t figure out how to do this given just a colo

Answer 1

If you want more simple and not accurately, below might help you.

public static int returnDarkerColor(int color){
    float ratio = 1.0f - 0.2f;
    int a = (color >> 24) & 0xFF;
    int r = (int) (((color >> 16) & 0xFF) * ratio);
    int g = (int) (((color >> 8) & 0xFF) * ratio);
    int b = (int) ((color & 0xFF) * ratio);

    return (a << 24) | (r << 16) | (g << 8) | b;
}