What color is Poster, "From Pushpin to Architecture" ?

Source Crayola® CSS3 CSS4
#434f81
 
#58427c
cyber grape
#483d8b
dark slate blue
#483d8b
darkslateblue
#616fa5
 
#7366bd
blue violet
#708090
slate gray
#708090
slategrey
#2c3345
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#8891be
 
#979aaa
manatee
#778899
light slate grey
#778899
lightslategrey
#b3b8d6
 
#b0b7c6
cadet blue
#b0c4de
light steel blue
#b0c4de
lightsteelblue