Why is the outside/inside so dark?

I've noticed as well. Everything is so blue for me. I can, however, recommend these mods if you're on PC.

Brighter Foundations by Lotharihoe:
https://lotharihoe.tumblr.com/post/627445275802451968/brighter-foundations-download-google-drive

Lotharihoe does have lighting mods as well if you're not too into Luumia's lighting mods. You can check under their visual mods.

No Blu by Luumia:
https://luumiasims.com/post/634432812440748032/its-been-well-over-a-year-since-noblu-v1-came-out
No Glo by Luumia (recommended if you're using No Blu):
https://luumiasims.com/post/167217001494/i-released-the-noglo-mod-about-a-year-and-a-half

And I'll throw in this one as well! I can't recommend it enough.
Simp4sims Overhaul 01 - Sims Graphics Rules
https://www.patreon.com/posts/simp4sims-01-51380490

Hope this helps. :)

Hi @glassaye does interior lighting look the same as before or is it only outdoor?

Are you playing in Henford on Bagley? I have seen people mention on how dark that world is. I think some game changers have mentioned it too.

I haven't noted the problem in other worlds but yeah henford is little strangely greyish and idk if its intentional but i keep feeling its simultaneously overly dark and not dark enough at night

No problems here. Following this topic.
Some places can be too dark, some way to bright (Like Oasis Springs)
Personally I just adjust the contrast and brightness on my monitor.

For me, Henford on Bagley is dark, particularly in the winter time. The sunset is very early, and it is usually overcast. I assume it is intentional, and set to mimic British weather. It is a little much for me, and I find that it leaves me feeling a bit depressed. The other worlds do not seem to have changed any. I will check out the afore-mentioned mods. I am a quarter way through winter and it has yet to snow. I really want to see what it looks like in the snow.

I haven't noticed it be overly dark. I am doing an off the grid farm so I am using candles, so that makes sense for me. Otherwise, outside is pretty normal for the weather. Went from Summer to Autumn heading into winter.

Have also noticed that Henford is darker than the other worlds, particularly in the later months.

It rains in my game so much I'm waiting to see if Noah in his ark comes floating down the canal! The skies are gray, and so is the world below it. Seriously, almost every single day in the Spring rain pours on my neighborhood and it's mostly cold. I don't think turning it off is an answer, either, as I may as well not have Seasons installed, since there would be no change. Terminal summertime — my least favorite season, by the way.

My Henford Game goes from ok to dim to darkish. I'd say that is the only thing that really bugs me about that pack. I wish they had toned down the gloomy side of it. Sometimes it's almost like Forgotten Hollow, which is also waaay to dark for my taste. Winter in Henford is so dim it becomes depressing.

Adjusting the computer doesn't help since it goes back and forth so much; I don't want to be constantly changing computer settings just because it is raining again.