My room mate has a color organ in college 40 years ago. It had multi colors, red, blue, yellow is what I remember.
Blue was for Base, boom, boom, boom.
Red and Yellow were higher frequency. I think red was mid range and yellow was highest frequency.
All the colors flashed on/off with the sound of the music.
It was a little bit interesting but boring too.
I invented a better one. If you paint 2 pictures one RED and the other BLUE, both pictures painted right over the top of each other. The RED light makes the blue picture so it can be seen. Turn off red, turn on the blue light only the red picture can be see. As the sound changes so do the pictures.
A used litho film to take photos, forest, beach, river, trees, sky, then used slide project to make paintings from litho film in 3 colors on the color organ. Now red, blue, yellow lights make 3 different pictures go on/off with the lights.
The way it works, red light makes red color invisible so you see only the other colors. Same for blue and yellow.
People use to stand and look at it for a long time trying to figure out why the pictures kept changing with the lights.