public void setDeepWaterColor(ColorRGBA deepWaterColor) {
        this.deepWaterColor = deepWaterColor;
        if (material != null) {
            material.setColor("DeepWaterColor", deepWaterColor);
        }
    }
sets the deep water color
see setWaterColor for general color
default is (0.0039f, 0.00196f, 0.145f,1.0f) (very dark blue)

@param deepWaterColor the color to use (alias created,
default=(0.0039,0.00196,0.145,1))
jme3-effects/src/main/java/com/jme3/water/WaterFilter.java