Couriers, delivery points and routes have a coloring function that paints the same color of the courier and orders on the route.
Couriers are colored in personal color. Nick is green and Danny is red. While orders are not assigned to a courier, they are grayed out and routes have not yet been created (screenshot 1).
Once the orders are assigned, the route will be created and colored in the same color as the courier, and the orders on the map will also be colored in the same color (screenshot 2).