Users can give chat rooms a special name, color or sound to help them stand out from others. From a chat room, click the three dot menu and choose Chat details (Figure 1):
Figure 1 Chat details
Click Customize and choose a custom display name, a color/sound and assign a notification type to accompany new messages for that chat room (Figure 2):
Figure 2 Customized settings
Note: These customizations are only visible to you.