Menu color dynamic adapting to background color

Hi,
i have a suggestion for a possible update ;) :
when use the different luminosity color in the header background, the menu color would adapts choosing between light or dark (negative) menu color.
Look i mean in the file attached:
https://www.dropbox.com/s/tvvgyndz9flyl8k/Schermata%202015-04-20%20alle%2010.03.10.png?dl=0

Thx!!!