Add changeable text to a toolbar (or in the window)

[Pout]

Is it possible to add text to a toolbar? That text should be changeable. So for example instead of small_icon i could use this:
cmd.text = $color

An alternative is to show a text continiously in the upper right corner of the drawing screen in SU

Are there any examples available of one of these 2?
Regards

PS. i have found add_note that gives me a good start, but the font is tiny and i don't think it is editable, no?

More something like this (right corner):