On the page Menu->Map options, you can change how the map looks, as well as whether the map/app should have a light or dark theme.
Under map type, you can choose to view the map in the app as a standard map, i.e. a traditional map, or as satellite images.
|Standard map||Satellite images|
Here you can choose to see, or not see, colors on the map that show how dense the traffic is in your area.
See our guide about enabling/disabling the dark mode too.