No adjustment of color/gamma settings that I'm aware of, and for that I thank the Devs!
Nice to put everyone on the same playing field
Sadly, that's not the case. We had the situation twice last week, that fog was not equal for all of us. Sometimes, i had a view distance of <100m where my mates could see far in the distance and vice versa. I don't know the cause yet, may be just a bug, but as i said, it happened more than once.