I've made a couple color changes to the board.

First, normal messages that have been viewed already are now a lighter shade of the same color, similar to how all of the other types of message work. All viewed messages are now simply 50% opacity versions of the color for non-viewed messages.

Second, brown is now used to show normal posts by your friends.

Yes, I'm aware that the brown color is very similar to the color previously used for viewed normal posts. It is darker, but not significantly so. Hopefully, everyone will get used to it fairly quickly.