Color services should have the option to require a finish service like modifiers
When scheduling online a client should not be able to book a color service without selecting a finish ie "haircut" "blow-dry" "wash and go" like in modifiers. This would solve a lot of double booking problems, client error, and keep the services separate for providers individual timing and price. A client is unable to book without a modifier (if selected) but every color needs a finish time even if just for a shampoo. Without it being required in the online scheduling, I feel clients will easily overlook. It is also not their job to ensure we have the appropriate time to finish them. It should be and option in color services to prompt the client to select the finish service before being able to book.