Xonsh not uses prompt-toolkit 2. This seems to mess up the colours and the arrows on the bottom prompt. I think this is because ptk2 by default reverses the colours that it is given in xonsh's $BOTTOM_TOOLBAR
I have a hack in https://github.com/bestlem/xontrib-powerline I also changed some of the hard coded colours to match my dark background. I could not work out the correct wt as something changes $BLUE to $ansiblue etc and I can see how to add reverse into that.
Xonsh not uses prompt-toolkit 2. This seems to mess up the colours and the arrows on the bottom prompt. I think this is because ptk2 by default reverses the colours that it is given in xonsh's $BOTTOM_TOOLBAR
I have a hack in https://github.com/bestlem/xontrib-powerline I also changed some of the hard coded colours to match my dark background. I could not work out the correct wt as something changes $BLUE to $ansiblue etc and I can see how to add reverse into that.