What color is Book, Peter Parley's Primer ?

Source Crayola® CSS3 CSS4
#4c4a41
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#9b9080
 
#95918c
gray
#808080
grey
#808080
grey
#727069
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey
#2c2b25
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey