What color is Sidewall (USA), ca. 1900–40 ?

Source Crayola® CSS3 CSS4
#888f75
 
#95918c
gray
#808080
grey
#808080
grey
#ab9575
 
#9f8170
beaver
#bc8f8f
rosy brown
#bc8f8f
rosybrown
#b6b597
 
#bab86c
olive green
#a9a9a9
dark gray
#a9a9a9
darkgrey
#84725b
 
#8a795d
shadow
#696969
dim grey
#696969
dimgrey
#5d4e3f
 
#414a4c
outer space
#556b2f
dark olive green
#556b2f
darkolivegreen