What color is Blueprint, Villa of M. Hemsy, St. Cloud, Facade Laterale ?

Source Crayola® CSS3 CSS4
#6284a5
 
#5d76cb
indigo
#778899
light slate grey
#778899
lightslategrey
#87a2b7
 
#979aaa
manatee
#a9a9a9
dark gray
#a9a9a9
darkgrey