What do all the colors on the OSM overlay of LiveMap mean?
One of the three options for your LiveMap is "OSM" which stands for "Open Street Map", an open-source alternative to Google Maps.
When switching from Map or Satellite view, into OSM view, you will find new colors and markings on the map itself.
To know more about what all of the colors, lines, and other markings mean, you can review the Open Street Map legend on the OSM website: http://www.openstreetmap.org/key