How can I change world colors?

It must be very simple, but I can’t find how to.
Thank you in advance

lol it’s simple…I think/hope…lol…It’s under the materials tab…lemme get on blender so i can be more specific:D
edit:ah yes the final “semi tab” under materials looks kinda like a blue ball…it’s under that:D

http://img53.imageshack.us/img53/3510/howtoid5.png

if you were talking midgame, you need Rasterizer.setColor([1,1,1]) or something like that, import Rasterizer and then print dir(Rasterizer) to find the command. Although I believe that it only works in shaded mode, not textured:(

To change it midgame just use basic python script, if you give me a while I can wright you a script. It’s kinda late and i’m tired so maybe not tonight.