What color is Photograph, Photograph of the Construction of a Mass-operational House Designed by Hector Guimard (No. 47) ?

Source Crayola® CSS3 CSS4
#7c7564
 
#8a795d
shadow
#696969
dim grey
#696969
dimgrey
#c4bca9
 
#cdc5c2
silver
#c0c0c0
silver
#c0c0c0
silver
#595448
 
#414a4c
outer space
#556b2f
dark olive green
#556b2f
darkolivegreen