Block colour for unavailable dates in calendar

Currently when you block dates, they have a cross through them which appears as though the dates aren’t open. Occasionally I block dates for the owners and have been creating a manual booking for this purpose. However, this throws out the Metrics.

Is it possible to have a blank block colour for zero income bookings?  This would overcome the risk of accidentally unblocking dates for such bookings when opening up dates for multiple properties.