What color is Print, Bibliothèque de France, Paris: Ground Floor Plan and Section ?

Source Crayola® CSS3 CSS4
#9fa7b6
 
#979aaa
manatee
#a9a9a9
dark gray
#a9a9a9
darkgrey
#4e596c
 
#4a646c
deep space sparkle
#696969
dim grey
#696969
dimgrey
#7a8192
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey