@Override
    public int hashCode() {
        int result;
        long temp;
        temp = Double.doubleToLongBits(l);
        result = (int) (temp ^ temp >>> 32);
        temp = Double.doubleToLongBits(a);
        result = 31 * result + (int) (temp ^ temp >>> 32);
        temp = Double.doubleToLongBits(b);
        return 31 * result + (int) (temp ^ temp >>> 32);
    }
Constructs a new instance.

@param l perceptual lightness L*.
@param a a* value.
@param b b* value.
src/main/java/org/apache/commons/imaging/color/ColorCieLab.java