I have updated the app for this project quite a lot. One of the things I did was rethink the colour scheme so it is brighter and so they worked better for all types of colour blindness. I used a website that helped me see the new colour scheme through different lenses. All of the colours worked out well and still stood out from one another. I also changed the imagery to make it simpler to understand. I used a repeated road scene to link app pages together and hopefully make it easier to understand for the users.
Colour blindness chart for the colour scheme and example of how it works: