@Override
    public int hashCode() {
        int hash = 37;
        hash += 37 * hash + Float.floatToIntBits(r);
        hash += 37 * hash + Float.floatToIntBits(g);
        hash += 37 * hash + Float.floatToIntBits(b);
        hash += 37 * hash + Float.floatToIntBits(a);
        return hash;
    }
<code>hashCode</code> returns a unique code for this <code>ColorRGBA</code> based
on its values. If two colors are logically equivalent, they will return
the same hash code value.

@return The hash code value of this <code>ColorRGBA</code>.
jme3-core/src/main/java/com/jme3/math/ColorRGBA.java