What color is Plaque (Netherlands) ?

Source Crayola® CSS3 CSS4
#1b2444
 
#414a4c
outer space
#191970
midnight blue
#191970
midnightblue
#91959e
 
#979aaa
manatee
#778899
light slate grey
#778899
lightslategrey
#617490
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey
#3d5984
 
#2e5894
b'dazzled blue
#483d8b
dark slate blue
#483d8b
darkslateblue
#384153
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey