How to style color of the blocked date/time on calender?

How to style color of the blocked date/time on calender?
Hosts need dark color for clear visibility of blocked date/times!

If you are familiar with CSS customization then please try to use this class .fc .fc-bg-event.fc-blocked to change the background color for a blocked date

If you are not familiar with code customization then please consider hiring someone for custom work https://fwd.cx/hLhc73mQCD9R