Any way to change the black background

I would love to spend more time on this forum but the black background gives me a friggin' migraine. I've messed around with Edit Options but I can't seem to kill this damn black background. This is soooooooooooooo 1997. Can anyone help?

Scroll down.
Bottom left corner.
Choose a diff. theme.

Yes, choose the "default style". The background is not black.

Thanks guys, I was poking around in my profile settings for it and never scrolled all the way down a forum page to look for it. The default is perfect, but all the images disappear unfortunately. Harro is a reasonable compromise. Note that if you choose Mobile the dropdown menu to change it back to something else disappears so your only choice is to blow out your cache.