Would be very handy for large libraries with lots of subcrates.
It would be much quicker when scrolling through to find colours rather than reading each individual crate name.

eg:
RNB: yellow
Hip Hop: red
Hip Hop compilation: orange
etc etc

The other advantage is you could colour tag crates for organisation or particular gigs.... crates to go through, crates to delete, old crates, wedding crate, underground hh crate etc.