[quote=@Inkarnate]
<Snipped quote by PrinceAlexus>
Yeah, I definitely have been considering adding a formatting rule to my stock RP expectations list due to stuff like that. But you know, aesthetics are 100% subjective, so what can we do really?

[/quote]

Just say you reserve thr right to ask people to use clearly legible colours and that you ask not to use dark grey that night on background colour, blues etc people struggle to read. 

They can use any other colours just have to be legible.