What color is Photograph, Photograph of the Construction of a Mass-operational House Designed by Hector Guimard (No. 23) ?

Source Crayola® CSS3 CSS4
#c8c3b8
 
#cdc5c2
silver
#c0c0c0
silver
#c0c0c0
silver
#7c7667
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey
#444039
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey