Source Crayola® CSS3 CSS4
#adaca3
 
#979aaa
manatee
#a9a9a9
dark gray
#a9a9a9
darkgrey
#79766b
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey
#4e4a43
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey