Thanks for your reply. This is the code I have and I tried ambient light from (0,0,0) , which made my cubes very dark grey to 250,250,250 which made them almost white
world = new World();
world.setAmbientLight(0, 0, 0);
sun = new Light(world);
sun.setIntensity(250, 250, 250);
the colour I have for the cubes at the moment is red=241 green =90 blue=43