@nic
More ideas for this request:
Icons
(?) Question mark
(i) Info icon
(!) Alert exclamation point - circle
<!> Alert exclamation point - triangle
(√) Checkmark
[Option for no icon]
Colors
Red
Orange
Yellow
Green
Blue
Purple
Light Gray
Dark Gray or Black
Allowing custom hex values would be even better. Could be similar to the global style guide settings for the color of other UI elements (dividers, etc). For example:
Callout colors:
#FFFFFF (delete)
#000000 (delete)