What color is Unknown ?

Source Crayola® CSS3 CSS4
#7a7866
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey
#7d9dac
 
#979aaa
manatee
#778899
light slate grey
#778899
lightslategrey
#a69f88
 
#95918c
gray
#bc8f8f
rosy brown
#bc8f8f
rosybrown
#a7b8b6
 
#b0b7c6
cadet blue
#a9a9a9
dark gray
#a9a9a9
darkgrey
#645545
 
#6e5160
eggplant
#556b2f
dark olive green
#556b2f
darkolivegreen