So, it was just confirmed: Update 23 will handle the light and color effects. This update is going to come out before DLC France, so it won't take months PeterS . Unfortunately, we cannot release a so called mini-patch.
DLC France is going to come out in a couple of weeks, that means in an even shorter amount of time, Update 23 will be here to soothe your tired eyes
Wow, this is great news! Thank you for listening to us! Knowing that the colors will be back to normal, now I'm all excited about the upcoming France DLC! Thanks again!