Well, i'd like to set the text in the posts to white because I use the darker theme. That way the text would contrast and be better than the gray the theme uses by default. I'd also like to know how to change the color of my text. Semix use pink, for example. I'd have to see which color would work well for the rest of the users, so I don't use a color that is easily readable in this dark theme, but painful to read in the light theme, like, I dunno, yellow.
If it was possible to make a theme, I'd like to give it a try. It'd take me some time to complete a design, though...