If you want to set a colored name before and/or after the username of the players in the chat when they send messages, you have to use the prefix/suffix.

First of all, you need a plugin that supports the chat formatting because PermissionManager doesn't format the chat. Nucleus and UltimateChat can do this.

How to set a prefix/suffix

To set a prefix, you have to do this /pm <collection> <subject> set option prefix 'prefix to set' or /pm <collection> <subject> set option suffix 'suffix to set'. So, if you want to set a prefix to the player djxy you have to do this /pm user djxy set option prefix '&a[Super Prefix]' and if you want to set a suffix for a group named Admin you have to do /pm group Admin set option suffix '&1[Great suffix]'.