import java.awt.Color;

// Some utilities to make color management easier.
// ----------------------------------------------------------------------
public class ColorUtils {

    // Return a color similar to c, but brighter by amount f.  (The
    // closer f is to 0, the larger the difference.)
    // ------------------------------------------------------------------
    static Color brighter(Color c, double f) 
    {
       return new Color( Math.min((int)(c.getRed()  *(1/f)), 255), 
                         Math.min((int)(c.getGreen()*(1/f)), 255),
                         Math.min((int)(c.getBlue() *(1/f)), 255) );
    }

    // Return a color similar to c, but darker by amount f.  (The
    // closer f is to 0, the larger the difference.)
    // ------------------------------------------------------------------
    static Color darker(Color c, double f) 
    {
       return new Color( Math.max((int)(c.getRed()  *f), 0), 
                         Math.max((int)(c.getGreen()*f), 0),
                         Math.max((int)(c.getBlue() *f), 0) );
    }
}