Are there any shortcuts for the hdb command?

No, this command does not have any aliases or shortcuts.

What rank do I need to use the hdb command?

You need the Mod rank or higher in HD Admin to use this command.

Type ;hdb [Text] in the chat while playing a game with HD Admin installed.

No, this command only works in games that have the HD Admin plugin installed by the game developer.

HD Admin Mod

The hdb command sends a dark blue hint with the specified text to everyone on the game.

This command sends a dark blue hint with the specified text to everyone on the game.

;hdb [Text]

Example: ;hdb hello everybody!

This command sends a dark blue hint with the specified text to everyone on the game. Run this command from the in-game chat by typing ;hdb.