Color now has two suboptions. After you have color on, you can also colorize room names and exits. Room names will indicate terrain the same way prompts will (wilderness=green, water=blue, other=white). Familiars will not be able to discern terrain this way and will always see the color "bold". Exits are all in bold, as well.

You must actively turn on these options if you want to use them, just as you must actively turn on color. Turning on either option will also turn on color for you.

Syntax:
color roomnames
color exits

"Roomnames" and "exits" can be shortened to just "r" and "e" if desired.