Add fallback colors for old browser

In my CSS, I use _RGBA_ colors without fallback. Old browser like IE6-8 will not be render them.

[here](https://github.com/alienlebarge/alienlebarge.github.com/blob/95d4c39cc1a83e5385c5058907ef9427642bde14/stylesheets/style.css#L1499) and [here](https://github.com/alienlebarge/alienlebarge.github.com/blob/95d4c39cc1a83e5385c5058907ef9427642bde14/stylesheets/style.css#L1763)
