Using alias to change ls to ls-l changes(or disables) the colors of ls output

Question

I've used alias to change ls to ls -l, but the colours change to the normal font of the terminal (also tried ls -l before the alias command and the colours appeared fine).

What is wrong?

Thank you

Solution

After searching more, I found about the --color option so I used this:

alias ls="ls -l --color" and it worked fine!

Comments

[waffl]

Just a note for mac users, the code would be alias ls="ls -l -G" via this answer