Skjold

You can download a chrome extension that will globally change any website's layout to have a dark-themed background. That depending on the website's layout as well. I don't use it for this website personally, but if you have the app enabled, your web page will look a little something like this if you want.

Do a little bit of browsing here and there to find the theme you like.

App extension for Chrome

Browse for some themes with the link below.

https://userstyles.org/styles/browse/global

If you want dark everything and are using Firefox, I suggest this. It's in no way perfect, but it looks cool.

https://userstyles.org/styles/47391/midnight-surfing-alternative

@SKIBBZ @KicksBrickster I'm already using one of those. I'm just thinking that it would be awesome to have one natively for the forum. It wouldnt be difficult to add.