I just bought FO1 on steam and the colors are all buggy. how can I fix this? also if this is not the right forum to post in could a mod move it to the correct one please

Did you install all the patches?

I'm not sure if the Steam one has them.

GoG does.

it patches automatically so I would assume yes unless steam dose not have said patches. I'm running on Win 7 so it could be that

I'm on win 7 too so It's not that.

I've not had to tamper with the .exe at all and it works fine.

I think its a steam issue I'm looking on there forums right now

It does it even with store bought games on Win 7. There's a patch on NMA iirc that fixes it. Otherwise I just alt+tab a few times and it's fine.