Whether you have AMD or Nvidia, it doesn't matter.
Go into the Color settings of your Graphics Card.
It should say something like this....
Gamma
Brightness
Contrast (or Color Vibrancy)
My settings are as followed (may differ from computer to computer)
Gamma is usually set to around .65 to .75 depending on what i want. (Gamma by default should be around 1.00)
Brightness (I left brightness alone
Contrast is anywhere between 150 and 200 (max) (100 is default with mine, im using 6800 series graphics from AMD)
Comparing these to default settings, the picture of your game GREATLY improves when the contrast and gamma are tinkered with.
Now keep in mind you may have to fool around with it, but trust me, fooling around with these could help you experience the game in a totally different atmosphere. It seems to bring out all the shades of color when you put the Gamma down a bit and the contrast up.
Thanks for reading guys!!!!