lsfrom the Shell mode?
In many systems,
ls is aliased to ‘ls --color’, which
prints using ANSI color escape sequences. Emacs includes the
ansi-color package, which lets Shell mode recognize these
escape sequences. In Emacs 23.2 and later, the package is enabled by
default; in earlier versions you can enable it by typing M-x
ansi-color-for-comint-mode in the Shell buffer, or by adding
(add-hook 'shell-mode-hook 'ansi-color-for-comint-mode-on) to
your init file.