Thanks for replying Carolina.
I hadn’t had that enabled and changed it, and that meant that while editing the background was black and text white.
However, I still have problems with the displaying of blog posts. I’ve uploaded some screen shots to illustrate.
This is a blog post on chrome or edge on Windows 10, its how I want it.
https://www.ctproduced.com/wp-content/uploads/2019/12/2.-Chrome-on-Windows-10-blob-post.jpg
This is what I get on android 10/pixel 2/ with both CHrome and Cake browsers, not as I expected
https://www.ctproduced.com/wp-content/uploads/2019/12/Screenshot_20191231-214832.png
Here it is on Apple/Safari, same problem.
https://www.ctproduced.com/wp-content/uploads/2020/01/Screenshot-2020-01-01-at-10.03.59-AM.jpg
If you request the desktop site from mobile, it works and you get this:
https://www.ctproduced.com/wp-content/uploads/2019/12/Screenshot_20191231-213127.png
I’ve no idea if this is a browser problem, a config option I’ve got wrong or missed, or something with the theme.
Any thoughts welcome, Happy New Year!