Source Crayola® CSS3 CSS4
#7f7b76
 
#757575
sonic silver
#808080
grey
#808080
grey
#534f4a
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#2b2926
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey