An example of gunmetal gray color, in which you can see slight bruises, is in the upper right corner. It has a film of the same name. They probably used this color in the movie.
#F4F7F7
#E2EAEB
#C8D6D9
#A1BABF
#73969D
#587B82
#4C676E
#42555C
#3B494F
#2C3539
#20292C
Related: Gray Gradients