You searched for CHANNEL COLOR
1. channel color
Syntax: @ color <channel name> <0‑7 or color name>
You can customize the color of any channel with this command. The channel
name will appear in the color on the channels list and all channel output
will be displayed in the color as well.
Each number matches a particular color. The list is:
1 Red
2 Green
3 Yellow
4 Blue
5 Magenta
6 Cyan
7 White/No Color
0 Black
The brightness can also be customized. See help 'channel brightness'.
If you are looking to change the color or brightness of rooms, objects,
exits, the say, tell, yell, or gtell channel, see help configuration.