public void setWaterColor(ColorRGBA waterColor) {
        this.waterColor = waterColor;
        if (material != null) {
            material.setColor("WaterColor", waterColor);
        }
    }
Sets the color of the water
see setDeepWaterColor for deep water color
default is (0.0078f, 0.3176f, 0.5f,1.0f) (greenish blue)

@param waterColor the color to use (alias created,
default=(0.0078,0.3176,0.5,1))
jme3-effects/src/main/java/com/jme3/water/WaterFilter.java