Because colors improve readability so much.
On Ubuntu 18.04 you can install it with sudo apt install grc

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We make sure that your target audience has the best possible experience with your digital product. You get:

For the impatient - try following commands:

grc netstat
grc ping hostname
grc tail /var/log/syslog
grc ps aux

Colorful output for several linux command line tools: grc