Per-server/Per-channel colour schemes

A feature that me and friends of mine have been interested in is per-server and per-channel colour schemes. People with Manage Server or Manage Channel permissions would be able to define custom values for each colour in the interface (main colour, sidebar colour, text colour, etc.) These colours will only appear when viewing the channel they have been applied to. A fallback colour scheme may also be set in the server settings. If a channel has no colour scheme set it uses the fallback server colour scheme, if there is no server colour scheme set it will use the default colour scheme. This setting would help to add a lot more personality to each server.