I'm pretty sure this is planned, but if not, I'll take this here.
Exotic: Neon Purple
Terran: Light Blue (default color)
Gas Giant: Green
Orz Bus: White LMAO
Orz An Interesting Idea, although It should be accompanied with other UI customization options.
(I.E. Permanently setting it to a single colour...)
This would be cool but a lot of work for me, so not a high priority.