[quote=@Ti]
There is Dark Mode extention for Firefox for example, and it even has "light mode" option it. Those who love light modes can use that, such as those who absolutely detest light mode due to light sensitivity can choose to have a dark mode extention.
[/quote]

Yeah, that would be my suggestion if someone wants a light mode. Multiple themes when people are going to go around using coloured fonts and stuff is just asking for trouble. Not a lot of trouble, tbh, but it still just shifts the burden of making sure people can read your posts around in weird ways.