How to set a custom profile background color without having a background image.
This guide is showing how to set a custom profile background color without having to have a profile background image.

Firstly, we must go to your profile settings which you can locate here: http://forums.d2jsp.org/settings.php?c=33

(to get to this page without my link, go to Settings in the top right of every d2jsp page, and go to Profile Settings to the left of that page).

Secondly, copy this link: http://i.imgur.com/oaJzA.png
After you copy that link, paste it into the spot in profile settings titled 'Background Image URL' and check the box directly above it to allow your background image.

(the link is an image consisting of 25x25 transparent 'invisible' pixels).

Next, go to this website: http://www.ficml.org/jemimap/style/color/wheel.html
Once there, move your mouse around until you find the color you want your background to be, and copy the code above the color in the box below. I chose black '000000'

Lastly, click the 'Save Settings' button which will make your decision final.
Once your settings are saved you can enter your profile and the background of your profile will be the new color.