Outlook Suddenlty Appeared Washed Out

my Office docs, inc Outlook and even the pages on IE have suddenly appeared washed out and a lot brighter. It is making my eyes strain and the blue wording you often see on IE pages such as on forums, is faint now, at least the small words that are often to the side of boxes etc. I did a system restore and that came back as successful but there was no change to the bright pages, they are still bright and washed out. All of the boxes for instance in Outlook at the bottom left of the screen, are all bright and washed out, everything is.

I've not been fiddling with buttons anywhere or altered any settings. I'd like to have it back the way it was. I do a bit of gaming with the table lamp off and I may have hit a key combination and ended up with it due to that. I don't know for sure. Does anyone know a sure way to make my screen look normal again? I'm using Vista Home Premium OS and my graphics card is NVIDIA 950GT.