android color between two colors, based on percentage?

You can try using ArgbEvaluator class from android API: http://developer.android.com/reference/android/animation/ArgbEvaluator.html :

new ArgbEvaluator().evaluate(0.75, 0x00ff00, 0xff0000);

Note that there is a bug ( http://code.google.com/p/android/issues/detail?id=36158 ) in alpha channel calculation so you should use values without alpha value.

My $0.02, I found this answer and coded up the proper solution. (Thanks to Alnitak for the HSV tip!)

For Copy+Paste:

  private float interpolate(float a, float b, float proportion) {    return (a + ((b - a) * proportion));  }  /** Returns an interpoloated color, between <code>a</code> and <code>b</code> */  private int interpolateColor(int a, int b, float proportion) {    float[] hsva = new float[3];    float[] hsvb = new float[3];    Color.colorToHSV(a, hsva);    Color.colorToHSV(b, hsvb);    for (int i = 0; i < 3; i++) {      hsvb[i] = interpolate(hsva[i], hsvb[i], proportion);    }    return Color.HSVToColor(hsvb);  }

As an updated solution, you can use ColorUtils#blendARGB from the Android support or AndroidX APIs:

val startColor = ContextCompat.getColor(context, R.color.white)val endColor = ContextCompat.getColor(context, R.color.yellow)ColorUtils.blendARGB(startColor, endColor, 0.75)