I started using Fish (and oh-my-fish) a couple of weeks ago and one of the things that I find somewhat visually hard is the default background color of the autocomplete options (see the purple background in the image). I tried looking in the Fish page, but couldn't find anything related to that. I'd like to know how that background color can be changed. In case you're wondering, I'm using LXTerminal in LUbuntu (a Ubuntu distro with LXDE).
Adding to top voted answer. The command fish_config colors
has been removed and you should instead use the following:
$ fish_config browse