- Color bar to hint the box with. Defaults to no hinting. Use CSS colours, e.g. names or hash-prefixed hex.
- Icon to use. Defaults to the tgchan logo unless a color is specified.
- Bold, leading part of the message, e.g. "this is a stub".
- Rest of the message, e.g. "you should add stuff". Remember that you can put (most) markup in template arguments, like links.