I blogged about Generic Colouriser (grc) last week, cause I'm using it now to monitor syslog messages in my centralised RSyslog setup. I also mentioned that grc suppors many standard commands in addition to parsing common types of log files.
Colorized ls Output
Many Linux distros and even macOS support colorized file listing of the ls command, etc. Here's how it usually looks:
Colorized ls Output with grc
Compare above example to how grc colorizes the same list of files:
Obviously, focus is on file permissions and ownership info.
I really like this, must be of great use for those of us just getting familiar with file/directory permissions in Unix/Linux.