How to edit nautilus side menu transparency and font color?

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http://askubuntu.com – I've been trying to customize my Ubuntu 12.04 Unity desktop. I am describing what I've done until now to make it easier to understand what is my practical question. Please don't refer to it as too localized. I like to have my desktop as clean and simple as possible, where the colors of the background image are shared by every other item. To accomplish this I edited the Radiance theme. I used My Unity for launcher color and transparency and also for top panel transparency. This is how it looks so far. Now I am attempting to edit the Nautilus color by following the instructions present in her (HowTos)