What color is Poster, IBM '75 ?

Source Crayola® CSS3 CSS4
#c1c9b3
 
#cdc5c2
silver
#c0c0c0
silver
#c0c0c0
silver
#a39787
 
#95918c
gray
#bc8f8f
rosy brown
#bc8f8f
rosybrown
#6f846a
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey
#424a52
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#442f38
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey