Everywhere i check says there is only one color gray (graphite gray) but when i see the photos of them they appear to be different colors. are the photos below all the same color? is it just the way the light is hitting them?

charcoal.jpg
car3.jpg
car2.jpg

I like the color of the first car best, the next 2 pics are of a car 8 hours away from me i am trying to get a deal on but the color appears to be darker and i am not sure if i like it.