What color is Drawing, Textile Design: Cubist Forms in Blue, ca. 1930 ?

Source Crayola® CSS3 CSS4
#515c71
 
#4a646c
deep space sparkle
#696969
dim grey
#696969
dimgrey
#798396
 
#95918c
gray
#778899
light slate grey
#778899
lightslategrey
#b7ac96
 
#deaa88
tumbleweed
#a9a9a9
dark gray
#a9a9a9
darkgrey
#938e87
 
#95918c
gray
#808080
grey
#808080
grey