the color of ls command output:
my current LS_COLORS is
‘di=36;40:ln=35;40:so=32;40:pi=33;40:ex=31;40:bd=34;46:cd=34;43:su=0;41:sg=0;46:tw=0;42:ow=0;43:exit’
http://linux-sxs.org/housekeeping/lscolors.html
http://geoff.greer.fm/lscolors/

the color of vi highlight:
turn highlight :syntax on
change the comment color in vim:
1. when vi edit file, input
:highlight Comment ctermfg=darkcyan

2. touch ~/.vimrc file
add ‘hi Comment ctermfg=darkcyan’ to .vimrc file, restart shell