What color is Photograph, Photograph of the Construction of a Mass-operational House Designed by Hector Guimard (No. 5) ?

Source Crayola® CSS3 CSS4
#bfbbb5
 
#cdc5c2
silver
#c0c0c0
silver
#c0c0c0
silver
#918a80
 
#95918c
gray
#808080
grey
#808080
grey
#31302e
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#736e65
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey