To change directory colors:

open ~/.bashrc or .bash_profile file with an editor and make an entry somewhere in the file:

LS_COLORS=$LS_COLORS:'<choice>=<style>;<color>:' ; export LS_COLORS

Example: To change the directory entries to purple:

LS_COLORS=$LS_COLORS:'di=0;35:' ; export LS_COLORS

Kinds of files whose ls appearance can be specified (fill in <choice>) :

di = directory

fi = file

ex = file which is executable (i.e. has 'x' set in permissions).

ln = symbolic link

pi = fifo file

so = socket file

bd = block (buffered) special file

cd = character (unbuffered) special file

or = symbolic link pointing to a non-existent file (orphan)

mi = non-existent file pointed to by a symbolic link (visible when you type ls -l)

*.rpm = files with the ending .rpm

Some color codes:

30 = Black

31 = red

32 = green

33 = orange

34 = blue

35 = purple

36 = cyan

37 = grey

90 = dark grey

91 = light red

92 = light green

93 = yellow

94 = light blue

95 = light purple

96 = turquoise

Styles:

0 = default colour

1 = bold

4 = underlined

5 = flashing text

7 = reverse field

40 = black background

41 = red background

42 = green background

43 = orange background

44 = blue background

45 = purple background

46 = cyan background

47 = grey background

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

These can even be combined, so that a parameter like:

di=1;4;31;42

in your LS_COLORS variable would make directories appear in bold underlined red text with a green background!