Earlier quoted context omitted.
Also test your new UI on older people. The older you get the harder it gets to distinguish between things with low contrast. Apple is really bad at this with the newer MacOS design, but obviously not the only once. It is like old people don’t use computers, and yes, it will happen to you to.
It's not just contrast. It's also font size. It's also the font itself. All websites should be readable in Firefox or Safari (or Chrome but I don't use that) with the minimum font size set larger than the default. I use 18 min and a lot of stuff breaks. I'm sure that other people would greatly benefit from even larger fonts. I don't care about "pretty". I'm resigned to not getting that. But a lot of text simply disap…
Technically not "let me choose my own font in Safari" but you can set a user style sheet which overrides fonts.
https://kgrz.io/safari-custom-user-agent-css-overrides-using...