I've created a dark theme using the stylus addon for Chrome and Firefox. If you have the stylus addon installed then all you need to do is click here or just make sure your url has everquest.allkahzam.com in it and then click on the stylus icon up where your apps are, and then click on find styles.
Or you can go here to install it.
Let me know if you find any places where the old parchment color still exists. I tried to find all of them but some might be hidden in weird places.
I also made a dark theme to the official EQ forums so you can install that the same way.
Edited, Jul 7th 2018 9:13pm by Gidono