Source Crayola® CSS3 CSS4
#888991
 
#95918c
gray
#778899
light slate grey
#778899
lightslategrey
#45485c
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#636b84
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey
#231f56
 
#1a4876
midnight blue
#191970
midnight blue
#191970
midnightblue