Blog text changed colors overnight

Hi,

I set up my blog in May and haven't messed with the the overall design since then. Last night I made a blog draft, this morning i went into publish it and found that my blogs were all dark grey text on black instead of white text on black. I've messed around with it this morning and it seems:

1) Universal blog font settings are still set to white.

2) Re-clicking on white and saving doesn't help.

3) I can manually change the font color back to white on an individual blog post, but I would of course prefer not to do that.

So I'm not sure what to try next.

My site: https://www.semutamusic.com/

The Post I manually changed back: https://www.semutamusic.com/post/weirdhouse-cinema-mad-love

Example of a jacked-up blog post: https://www.semutamusic.com/post/weirdhouse-cinema-troll-2