Horizon color won't change, stays grey?

[zamise]

Older files where I've changed the horizon color it seem to work fine and I can adjust it, but if I start new with the startup file and change the world's horizon color it stays grey. I can't seem to find a changed setting anywhere, and this only happens in the game engine works fine in render. How do I fix it? Thanks!

[Jedijds]

Is the shading next to the mode menu set to textured? Many color options will not work unless that is in the Texture mode.

[zamise]

That was it! Thanks mucho!