I could only find where the API documentation only mentions "whiteLabel.headerBackgroundColor"
, but in the Dashboard of a Reseller Client account, there is a Header and Left Menu color option. Can the Left Menu be set through API as well?
You are right: the menuBackgroundColor JSON property is missing in the related API documentation. I forward this to my colleagues on the development team so it can be updated.
In the meantime, you can already use this property to set the menu's color.
Thanks for reporting this!