I’ve built two Admin Colour schemes for WordPress. Both are based initially off of the themergency theme generator, but with extensive changes. Notably the split colours of the admin menu and the admin bar. I’ve also accounted for form highlights, selection, checkboxes, and the progress bar on videos.
The first is called Tangerine:
The second is called Goldenrod:
Both are available on GitHub:
Install by activating the plugin, and going to your user profile, a new colour scheme option should be visible.