Colors in linux terminal

This week I started my new job with Smartapps. The first thing I usually do is check out the excisting EBS environments. I also did the same starting here...When starting a putty session on one of the EBS nodes, I noticed the different colors when using the ' ls' or 'll' commando. I find it very annoying, so I decided with my new colleagues to remove this.
I found this was caused by the use of aliasses.

alias cp='cp -i'
alias l.='ls -d .[a-zA-Z]* --color=tty'
alias ll='ls -l --color=tty'
alias ls='ls --color=tty'
alias mv='mv -i'
alias rm='rm -i'
alias vi='vim'

So, all I had to do was unalias the ' ls' and the 'll' commando (and make a new alias for ' ll' )