Change Calendar Colour when day is booked out

Thank you for the great tool, enjoying customising it to my needs.

I would like to use the OS Service Booking for booking entire day slots as opposed to time slots during the day.

How can i change the calendar to display a different colour when a day is booked out?

Any hints or tips

Hi Peter,
Unfortunately, OS Services Booking doesn't have feature to change different color with full booked date. Because the timeslots in OSB are generate automatically. So we aren't able check the date is full booked or not.
Thanks
Dam