What color is Drawing (Netherlands) ?

Source Crayola® CSS3 CSS4
#3e4965
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#96a1a2
 
#979aaa
manatee
#a9a9a9
dark gray
#a9a9a9
darkgrey
#6d7b89
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey