When starting EQ the brightness changes

[Mark11]

Means: brightness goes up very much and contrast goes down..i put 2 pictures in to make it more clear.

https://imgur.com/t2IOK72

https://imgur.com/rPW7vd0

Not sure if you see the difference, my whole pc has this brighten-effect from playing EQ again, its not only ingame.
I noticed the difference very much as randomly this effect disappeared, because i closed another program and i just thought "wow, what strong and intense colours this game has !" lol..well, can you help me get this effect away ?
It appears in the middle of starting up the game..it seems to load something that changes my graphics.