Is it possible…
to link the Skylight Light Color → to the Sky Atmoshpere Color? :rolleyes:
Thanks a lot for any little help!
cheers 
You have to recapture the sky during runtime to get them to match. The Time of Day default map does this on tick within the level blueprint with a huge performance loss. I found putting the recapture on a timer that fired once per second was good enough and didn’t produce a noticeable hitch on my hardware. 4.26 is supposed to come with a faster native skylight recapturing so it can be done without hitches.
An alternative approach would be to create a color curve asset that matches your time of day system and sample it according to what time it is, but it will not be as good.