Ed,
I have found it to be a challenging color to capture. Extremely variable depending upon the angle of the sun, and any shade or clouds. The ferry picture was taken on a very cloudy morning so the color was muted. You can see the clouds on the rear hatch window. I was intrigued by the juxtaposition of the straight lines of the white framework and the curves of the car at an angle I had not previously viewed.
Here is one of the same car taken on a sunny near cloudless morning with some shade from a tree and the adjacent building. The color appears quite different. Even just tilting the monitor screen changes the appearance of the color.
N.