What color is Sidewall (USA) ?

Source Crayola® CSS3 CSS4
#3e3c4a
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#9c9e96
 
#95918c
gray
#a9a9a9
dark gray
#a9a9a9
darkgrey
#8a8666
 
#8a795d
shadow
#808080
grey
#808080
grey
#585237
 
#414a4c
outer space
#556b2f
dark olive green
#556b2f
darkolivegreen