change color depending on vi-mode

[Fabian Braennstroem <f.braennstroem@xxxxxx>]

Hi,

I am pretty new to zsh and like it a lot. As a prompt style
I use 'adam2'. Now, I would like to know, if it is possible
to display some information or change the color of the bar
depending on the current vi-mode? E.g. I would like to have
a red line in insert-mode and a blue line in
navigation-mode.

Greetings!
 Fabian