Possible Duplicate:
Can I change the Unity Launcher transparency?
Unity 3d icons and launcher:
Unity 2d icons and launcher:
In unity 2d, the icons looks darker than in 3d. In 3d, the icons have a clearer color to them because of the transparency they're given. I really like the 2d dark color. I have searched frantically and have found NOTHING about this. I have used confity, compiz (with extra plugins), gconf-editor, and searched for compiz rules. Nothing.
EDIT: I understand that you can edit the top panel's opacity with compiz settings manager, but I haven't found a way to do this for the Dock/Launcher alone.