What color is Separation For Silkscreen ?

Source Crayola® CSS3 CSS4
#66362b
 
#714b23
raw umber
#8b4513
saddle brown
#8b4513
saddlebrown
#765856
 
#6e5160
eggplant
#696969
dim grey
#696969
dimgrey
#80716d
 
#757575
sonic silver
#808080
grey
#808080
grey