Color-Match Vehicles to Control Towers

By the middle of the game, we tend to have LOTS of control towers and piles of vehicles. What if we could colorize a control tower and make it so that all of the vehicles attached to that tower became the same color? That way, instead of seeing a random vehicle moving and having to click on it and follow the path all the way across the island, you could see that it was blue and remember 'all blue trucks are dumping Slag to make the Cargo dock.'
It would be way more visible that the blue halo that appears around vehicles when you click on a tower and it would be persistent so you could see it even if that tower wasn't clicked on.