My Many Coloured Days

I had an idea to colour code the events, so for instance all performance events and workshops are coded blue; walks, trails and tours are green; mass events are red; suggested activities will be yellow and designated days black. Either the type will be the colour or possibly the page on which the events fall. This put me in mind of a fab book called 'My Many Coloured Days' by Dr Seuss. Maybe that's where I got the idea?