Multiple themes should be available for the forums, sort of like how there was a custom theme on St. Patricks day, except they should be available more often. (I.e., a dark mode.) There are many ways you could make a dark mode look good, like the dark theme on http://www.mc-market.org/ (https://gyazo.com/ea365331c06652d1c849513b765aaabf). It looks so sleek and is much easier on the eyes. You could also incorporate different colored themes to appeal to more people.