Basically I'm wondering if it would it be possible to add an option for a Touch Bar button to not highlight on tap, so when a Touch Bar button is tapped, there is no change in the icon/button appearance, but the action preforms normally.
Edit: Also, an option to have a pure black button around an icon, so only the icon is highlighted.
I'm not sure about the not highlighting on tap, but you can make a button black under advanced configuration>TouchBar Button Color and nothing except the icon will appear!