There is some RGB lights
http://flashlights.parametrek.com/index.html?led_color=RGB
Many years ago ttrev, Cereal_Killer and Dr Jones had some pretty nice RGB projects
https://web.archive.org/web/20190503075424/http://drjones.nerdcamp.net/rgbw.html
kaidomain sells bare minimum RGBW driver/led kits drivers.
I would love for a modern RGB light with fancy open source and open hardware that was sold at a reasonable price.