I can't comment @jimmij 's answer, because I have less than 50 rep, but I would like to explain what worked for me on bash.

If you run

man ls | grep color

you will see all the entries of the man-page for your specific shell environment (in our case bash).

For me the following adjustment did the trick:

alias ls='ls -G'

I can't comment @jimmij 's answer, because I have less than 50 rep, but I would like to explain what worked for me in Bash.

If you run

$ man ls | grep color

you will see all the entries of the man-page for your specific shell environment (in our case bash).

For me the following adjustment did the trick:

$ alias ls='ls -G'