@Override
    public String toString() {
        return "Color[" + r + ", " + g + ", " + b + ", " + a + "]";
    }
<code>toString</code> returns the string representation of this <code>ColorRGBA</code>.
The format of the string is:<br>
Color[R.RRRR, G.GGGG, B.BBBB, A.AAAA]

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