When you set the named filter My Vehicles and Services on the Team Work Orders screen…
...the background color of status icon depends on the following conditions:
Magenta means that vehicle is checked-out with Active phase
Yellow means that vehicle is checked-out with Completed phase
Orange means that phase or service is started
Cyan means that multiple phases or services are started
Green means that vehicle is not checked-out, and no phases or services are started
Red means that vehicle is not checked-out, no phases or services are started, and work order has been billed