I've recently switched to the darklooks theme (shipped in gnome-themes-extras). It's really nice, except that it's a pain for browsing the web, since most websites assume the default background is white and the default font color is black. A lot of websites are thus unreadable (http://www.planet-im.com/ was the last example that made me open the bug).

It turns out gecko has a setting to not use the system colors as default: browser.display.use_system_colors

It should be possible to easily set this to false. Or maybe have a setting as part of the gtkrc file in the theme, and epiphany would look for it there, so it would automatically work for all themes.