text: package com.richardradics.commons.util;
  
  import android.graphics.Color;
  
  import java.util.Random;
  
  /**
   * Created by Richard Radics on 2014.12.11..
   */
  public class ColorUtil {
  
      private static Random randomGenerator = new Random();
  
  
      /**
       * Gets a random darker color.
       * @return
       */
      public static int getRandomDarkColor(){
          int randColor = getRandomColor();
          return darker(randColor, 0.75f);
      }
  
  
      /**
       * Retuns a darker color from a specified color by the factor.
       * @param color
       * @param factor
       * @return
       */
      public static int darker (int color, float factor) {
          int a = Color.alpha( color );
          int r = Color.red( color );
          int g = Color.green( color );
          int b = Color.blue( color );
  
          return Color.argb( a,
                  Math.max( (int)(r * factor), 0 ),
                  Math.max( (int)(g * factor), 0 ),
                  Math.max( (int)(b * factor), 0 ) );
      }
  
  
      /**
       * Returns a random color.
       * @return
       */
      public static int getRandomColor(){
          return Color.rgb(randomGenerator.nextInt(255), randomGenerator.nextInt(255), randomGenerator.nextInt(255));
      }
  
  }
  