As someone who loves to dress up his posts, I have no problem with using colors in my posts. However, I do refrain from using colors for my non-dialogue text. The only exception to this would be using either gray or silver. I'm probably in the minority here, but I find colors gives posts a bit more life. Though, it depends on what RP I'm in. If other people are using colors, then I will approach it like I always have, but if I see no one adding color to their character's dialogue, then I will make that one special exception since I don't want to make my posts stand out(not in that way, at least).

But hey! I'm aesthetic trash, so what do I know?