Long Answer
The site's colors are not (and never were) based on any games in the bemani series. I color the layouts in whatever manner I like when I design them. The only reason the red went away was because too many people complained. Blue and White replaced it because it's much easier on the eyes than dark colors, it was in no way influenced by IIDX Happy Sky. Especially since anyone who knows me can tell you that Happy Sky is pretty much my least favorite IIDX style.
Short Answer
We're not making any new color schemes for this revision of bemanistyle.
honestly (I'm new here) but I think we could have a client side way of seeing it you know? like you can make it so only you can see it the way you wanna see it
useing IRLs client side pictures and colours