What color is Photograph, Photograph of the Construction of a Mass-operational House Designed by Hector Guimard (No. 17) ?

Source Crayola® CSS3 CSS4
#393634
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#6c6656
 
#6e5160
eggplant
#696969
dim grey
#696969
dimgrey
#847e74
 
#757575
sonic silver
#808080
grey
#808080
grey