Add the following to ~/.bashrc
alias ls='ls --color' LS_COLORS='di=95;1:fi=0;1:ln=91;1:pi=5;1:so=5;1:bd=5;1:cd=5;1:or=31;1:mi=0;1:ex=96;1:*.rpm=33;1:*.deb=33;1' export LS_COLORS
Then execute .bashrc to apply the changes.
source ~/.bashrc
0 = default colour 1 = bold 4 = underlined 5 = flashing text 7 = reverse field 31 = red 32 = green 33 = orange 34 = blue 35 = purple 36 = cyan 37 = grey 40 = black background 41 = red background 42 = green background 43 = orange background 44 = blue background 45 = purple background 46 = cyan background 47 = grey background 90 = dark grey 91 = light red 92 = light green 93 = yellow 94 = light blue 95 = light purple 96 = turquoise 100 = dark grey background 101 = light red background 102 = light green background 103 = yellow background 104 = light blue background 105 = light purple background 106 = turquoise background
For more details
http://linux-sxs.org/housekeeping/lscolors.html