Colour issues with dark Genesis sub-theme

So I've been developing a dark sub-theme for genesis to go with my site and I've come across a few minor niggles with regards to colour and contrast therein. I've had a hard time tracking down the classes for certain objects in the style sheet and I was wondering if anyone could point me at them or otherwise tell me what I need to add to it in order to affect them.

The items that currently concern me are (circled in magenta):

1.) The edit tab that appears in the menus if you're an administrator when you roll over them. This One appears to have the div class "edit" but adding that to the style sheet doesn't cause any changes. I'm think there's a hover in there as well but I'm not sure.

2.) The Tabs that pop up on certain pages. Wanting to change them to a different colour. pretty sure they're an image of some description but not too sure on how to tackle them. Any clues as to where and how they are handled by Drupal would be a help.

3.) Some of the message boxes Are still showing up as default colours. This particular one is a table that goes by the class "update" but once again, adding the update class into the CSS and setting a background property doesn't override the default.