LSCOLORS Generator
To use
Go here or clone the repo and open index.html in your favorite browser. Pick the colors you like, then copy the LSCOLORS environment variable into your bashrc/profile/zshrc/whatever. Remember that it's LSCOLORS for BSD and LS_COLORS for Linux.
Troubleshooting
If you don't see any colors at all, you might also need to run ls with certain parameters (ls -G on BSD, ls --color on Linux) or set an environment variable (export CLICOLOR=1).
If the colors in your terminal don't exactly match up with the preview, you probably have a fancy terminal theme.