Design Two Pages of a Booking/Scheduling Web App

We're creating a new web app that lets people (photographers, accountants, etc.) have their clients sign up and book some time with them. This current project is focused on the public site right now (there are two sides). Users will be able to set their availability and their clients can pick a day/time and schedule the time slot for whatever service our customer is offering. A couple of rough wireframes for the public facing part of the web app...where clients can book a time with our users: [login to view URL] and [login to view URL] These are the only two pages we're getting designed right now. Since users/customers will customize the public facing site, the design should be flexible enough to accommodate different colors and images that may be used by people on their site. It's a bit like a site builder but also like Calendly, etc. in that way. So the image you see in the screenshot above will be different for everyone. And the colors on the site will be different as well. But we'd like to have some nice defaults in case they don't upload an image and don't pick any colors. Maybe just a white background as default (with some light background patterns possibly? Open to suggestions). Style/design preferences: * Font will be Open Sans * Sites with designs that we like: [login to view URL] and [login to view URL] and [login to view URL] * Primary color for the site: green