What I love about RGB is the flexibility: I have a white case (Lian Li 011-D) with a custom waterloop. I run 9 cheap chinese RGB fans (EZDIY-FAB) and two custom rgb strips at top and bottom, which emit light against two white radiators. [1] The white allows the light to reflect from basically every surface in the case. They come with a custom rf remote, and I setup everything so I can control the strips and the fans separately. Currently, the fans are all white, with the strips being red at top and bottom.

But if I want to, I can go all unicorn... - or turn everything off.

[1]: https://imgur.com/7PqDhKo