For "ls --colors", the default is controlled by an environmental variable called LS_COLORS. To find your settings ...
There doesn't appear to be a man page that covers the variables or color values, but you can play around with them easily ...
The string "di" appears to represent directories, "fi" represents files, "ln" represents links, etc. The colors (which appear as a number or number;number) seem to be the same scheme used by the prompts ($PS1, $PS2, etc) ...
# Working directory in title bar, green prompt:
# 0;30m black
# 0;31m red
# 0;32m green
# 0;33m brown
# 0;34m blue
# In triplet a;b;c a is foreground b is background
See also http://www-128.ibm.com/developerwork...tip-prompt/#h1