@Override
    public void read(JmeImporter importer) throws IOException {
        InputCapsule capsule = importer.getCapsule(this);
        r = capsule.readFloat("r", 0);
        g = capsule.readFloat("g", 0);
        b = capsule.readFloat("b", 0);
        a = capsule.readFloat("a", 0);
    }
De-serialize this color from the specified importer, for example when
loading from a J3O file.

@param importer (not null)
@throws IOException from the importer
jme3-core/src/main/java/com/jme3/math/ColorRGBA.java