Color variance between mac os and windows

I'm working on a fairly big web project. The site features a colorful landscape background. I'm about to include diff开发者_高级运维erent CSS files for mac and windows because of the severe color variance. Am I out of my mind? Too picky? Am I the only one who would consider this?

... I'd say outside of the good old 'web safe' colors all bets are off. Not sure what role color profiles will help here (just don't know), you might have to go for a 'middle of the road' approach. I'd design for the baseline of your audience. Is there any difference between JPG's and PNG's when it comes to photographs?