Change the erase color

hi today I was wondering if is possible to change the eraser color
because when I´m editing in the editor I use shortcuts in the Wacom but when I use the tool erase is so easy to work and I would like to switch this color for 0 to another label solo in some parts I use 0 labels and in other ones I use label 2 or label 41 (from freesurfer) so I was thinking on messing with the original script to create something like

  • q: erase value 2.

  • if key == ‘q’:
    abortEvent = True

    but I don’t find the script that contents the eraser tool