Yes, absolutely! You can change the color of any element in the booking form to match your business' branding.
During the creation process, and also during the editing process if you already have a booking form, the following step will appear:
As you click on any element's color, a color picker will appear:
As you make changes to the colors, the preview of the booking form to the right will update as you make changes. However, don't worry, changes are not published live to your website until you click the "Save Changes" button.