I'm confused about not being able to change some colours/backgrounds on some areas of my subs layout. So, here are a few simple questions. it's likely it's a no in each case, but just want to clarify:-

1. Can I change the "members", "online" and "created date" text colours? (On desktop) I've changed all my colours several times, and the above mentioned text remains unreadable (my sidebar is black with purple title background)

2. Can I change the background colour of the subreddit's name (currently a white banner on my desktop) no I don't mean the banner above that, I've already changed it to red. I mean the banner that r/subnameexample sits on.

3. Can I change the background colour of the "create a post", "hot", "new" and "now" sections? I had a feeling they are linked to the "light" and "dark" themes, that govern the appearance of reddit as a whole. Am I right?

Thanks in advance