What color is Sidewall (England) ?

Source Crayola® CSS3 CSS4
#6e829a
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey
#94acbe
 
#a2add0
wild blue yonder
#a9a9a9
dark gray
#a9a9a9
darkgrey
#8e9693
 
#95918c
gray
#778899
light slate grey
#778899
lightslategrey
#686f73
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey
#2a2728
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey