Oh, then it makes sense.
I thought it was intended for both: blog page as well as blog posts (sub-pages).
Yes, that is correct.
I would like to customise all blog posts tagged as “Fair”.
Actually, both on blog page and blog posts.
I would like to change blog post title font’s styles and to hide blog post categories on these specific pages.
(Not especially background colour… it was just a test.)
I’ve inspected the code to find something high in the body (like json data).
In vain.
Would you have something to do this?
Thank you @creedon