Some screen colors are indistinctive around sunset time

[justgetflux100]

Hello there,
Here are my preferences:

But around the sunset there is this weird tip that I can get rid of:

It makes a lot of light colors on the screen indistinctive:
For example, light green or light pink from half an hour ago will be almost white.

Does anybody know who I can get rid of it, make the transition from daylight to nightlight not go up first, then down, but down right away?

[justgetflux100]

* tip that I can't get rid of
* how I can get rid of it