What color is Slip case for a book Case ?

Source Crayola® CSS3 CSS4
#644d35
 
#714b23
raw umber
#556b2f
dark olive green
#556b2f
darkolivegreen
#b1a89e
 
#979aaa
manatee
#a9a9a9
dark gray
#a9a9a9
darkgrey
#866c40
 
#85754e
gold fusion
#a0522d
sienna
#a0522d
sienna
#6a7874
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey
#4f5855
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey