In Gnome Shell, how can you change the dark color scheme when you hit the super key?

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http://askubuntu.com – I would like to get rid of the darkening of the desktop that occurs when you hit the super key or move the mouse cursor to the corner of the screen in Gnome Shell. I would also like to change the black bar up top to match the Adwaita color scheme. Is there an easy way to modify this? Thanks a lot for any help! (HowTos)