Source Crayola® CSS3 CSS4
#8689a6
 
#979aaa
manatee
#778899
light slate grey
#778899
lightslategrey
#434377
 
#58427c
cyber grape
#483d8b
dark slate blue
#483d8b
darkslateblue
#686b94
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey