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The source code is released under:
Apache License
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package com.echo.holographlibrary; /*from www.ja va2 s. com*/ import android.graphics.Color; /** * Created by sbaiget on 11/04/2014. */ public class Utils { public static int darkenColor(int color) { float[] hsv = new float[3]; Color.colorToHSV(color, hsv); hsv[2] *= 0.8f; return Color.HSVToColor(hsv); } }