Since there was already a good community driver I actually assisted with adding that functionality to this one: [RELEASE] Zooz ZEN32 Scene Controller (community driver) . You can set the LED colors and flashing from a custom commend.
I also made a few custom tweaks to that driver on a forked repo: https://github.com/jtp10181/Hubitat-RMoRobert/blob/master/drivers/zooz/zooz-zen32-scene-ctlr.groovy
