public ColorRGBA multLocal(float scalar) {
        this.r *= scalar;
        this.g *= scalar;
        this.b *= scalar;
        this.a *= scalar;
        return this;
    }
Multiplies each r,g,b,a of this <code>ColorRGBA</code> by the given scalar and
returns the result (this).
Used as a way of making colors dimmer or brighter.

@param scalar The scalar to multiply by.
@return this*c
jme3-core/src/main/java/com/jme3/math/ColorRGBA.java