Source Crayola® CSS3 CSS4
#252f38
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#285a70
 
#1a4876
midnight blue
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#557c89
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey