What color is Drawing, Design for a Book Cover ?

Source Crayola® CSS3 CSS4
#ccc7aa
 
#cdc5c2
silver
#c0c0c0
silver
#c0c0c0
silver
#6f725c
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey
#515245
 
#414a4c
outer space
#556b2f
dark olive green
#556b2f
darkolivegreen