What color is Ladder, Maira Kalman's Ladder, ca. 1949 ?

Source Crayola® CSS3 CSS4
#413a3a
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#696a75
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey
#826138
 
#85754e
gold fusion
#a0522d
sienna
#a0522d
sienna
#858898
 
#95918c
gray
#778899
light slate grey
#778899
lightslategrey
#bccce4
 
#c5d0e6
periwinkle
#b0c4de
light steel blue
#b0c4de
lightsteelblue