Source Crayola® CSS3 CSS4
#52504b
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#2e2b2a
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#81817a
 
#757575
sonic silver
#808080
grey
#808080
grey