Only thing with colour is that it would be redicuosly hard to read with some colours for those who are colourblind, like myself. Other than that I have no objection towards it.

And as Asci said, Bold and Italics would just be too annoying to read constantly.

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[nonono, you got it wrong... I am sexist... but sexist against guys i mean]
[women are soo much better.... alot sexier and cuter and sure as hell smell better ~Exarius]

[I'm so holy that when I touch wine, it turns into water]
见鬼为气候,和天堂为公司