Allow color coding for different services on Booking page

My team would find it beneficial to be able to set separate shading colors for different Services on our booking site to allow our end-user community to find the training session type they are looking for.

For instance, single-user/small group sessions are shaded light blue, and large group sessions (eg:100+ users) be dark blue.  This way at a glance on the landing page users could session type they are looking for at a glance when organizations have dozens or more Services offered.