How to edit zenith and horizon colors to get darker quicker and stay darker longer?

So this is a problem that’s been plaguing me for a while now. There’s no ue4 documentation on it in the curve editor, no real tuts out there and no threads that I can find.

Mostly trial and error I end up having to delete both horizon and zenith curves and restart.

My day/night cycle is getting ruined by this cause the sunset stays yellow for so long. I need it to get dark and stay dark so there’s actually a night.

Day is usually like this (default horizon/zenith)

Day: 3 mins, sunset 3 min, “night” (horizon is white for some reason?) for like 1 minute, then sunrise for 3 and then repeat.

Any help appreciated.