It didn't happen often but for security reasons in some conflict areas MSF decided to paint their white Land Cruisers in pink to make sure everyone knew who was driving the car. It also made their cars less attractive for thieves.
Eh, I'd say it is quite a stretch to call that color "pink".
But I guess in comparison to other traditional martial colors? But show that photo to a person on the street and ask what color it is... you're unlikely to get "pink" in response.