Allow setting the colour of your Discord webhooks

[theastropath]

This doesn't seem to be a thing yet, but opening this issue to track the behaviour.

If you actually make a bot user (top), you can set the user to have a role (and by extension, a colour). Hopefully they add support for setting a message colour on webhooks in the future.

[theastropath]

There is a discussion requesting this feature:

discord/discord-api-docs#3245