How do I get colors and syntax highlighting on a TTY?
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In Emacs 21.1 and later, colors and faces are supported in
non-windowed mode, i.e. on Unix and GNU/Linux text-only terminals and
consoles, and when invoked as `emacs -nw' on X and MS-Windows. (Colors
and faces were supported in the MS-DOS port since Emacs 19.29.) Emacs
automatically detects color support at startup and uses it if
available. If you think that your terminal supports colors, but Emacs
won't use them, check the `termcap' entry for your display type for
color-related capabilities.
The command `M-x list-colors-display' pops up a window which
exhibits all the colors Emacs knows about on the current display.
Syntax highlighting is usually turned off by default; see Note:Turning on syntax highlighting, for instructions how to turn it on.