Source Crayola® CSS3 CSS4
#5b7d9b
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey
#869faf
 
#979aaa
manatee
#778899
light slate grey
#778899
lightslategrey
#adbdc2
 
#b0b7c6
cadet blue
#c0c0c0
silver
#c0c0c0
silver