Help with projector video being in color

Hey there I have been looking for a way to make a projector like beam that would play a video. So far I have everything working with the video playing, etc. But the only problem is I can’t figure out how to make it have colors. I can change the colors by simply changing the beam color, but that is still only one color which just isn’t enough. I just wanted to know if anyone has ever done this or has an idea how it could be achieved.