One aspect of success I have noted with doing these play-by-post games is to put any mechanic into a hider, writing the rest of the material outside of it. It appears more elegant for one, but also allows one to quickly determine just what exactly they meant.

[Quote]
Harun grits his jaw, grasping his axe and skilfully adjusts the placement of his feet, knowing that battle is momentarily upon them. Eyeing carefully for the first opening, he prepares the traditional orc tactic of old; rush the nearest for and carve them in two with all the rage he can muster. Yet, before he can so much as act, it seems the foes before him were already anticipating the charge, sending their most armored man to the front...

[Hider]
Harun rolled a 13 for initiative.
Harun will charge the nearest enemy on his turn, gaining a +2 to his attack but lowering his Armor Class by -2.
Harun attacks for 16 versus Armor Class. If he hits he deals 9 points of slashing damage with his [i]+1 keen greataxe[/i].
[/hider]
[/Quote]

Obviously this will mostly only change when certain conditions force them to, but given that initiative determines that, interruptions should be fairly rare. There will only be a few immediate actions I can think of anyone using and they can just simply state them - or attacks of opportunity - here in the Out-of-Character.

As for text colors, I would prefer to use white for myself; default. For a few reasons personally, but if someone would rather, then I would like to use pale gold.