What color is Photostat, Plasticine Wind Tunnel Model for a Streamlined K4s Class Locomotive, Pennsylvania Railroad, 1936 ?

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#c0b8b1
 
#cdc5c2
silver
#c0c0c0
silver
#c0c0c0
silver
#3a332f
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#58534d
 
#414a4c
outer space
#556b2f
dark olive green
#556b2f
darkolivegreen
#7f7872
 
#757575
sonic silver
#808080
grey
#808080
grey