It would be hard but can you add custom messages for your command usage in messages.properties? As it's not nice having a fully white message displayed.
You can actually edit the descriptions found in the plugin.yml, here's an example:
tpa:
description: 搂6Sends a teleport request to a target player.
usage: 搂c/<command> <player>
This will make the help message appear colored ingame, with 搂6 representing gold and 搂c representing light red.
Thank you!
Working just fine.