What color is Sidewall (USA) ?

Source Crayola® CSS3 CSS4
#8698aa
 
#979aaa
manatee
#778899
light slate grey
#778899
lightslategrey
#495a6a
 
#4a646c
deep space sparkle
#696969
dim grey
#696969
dimgrey
#687888
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey
#2d374c
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey