Source Crayola® CSS3 CSS4
#403e42
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#7ba1d0
 
#6699cc
blue gray
#6495ed
cornflower blue
#6495ed
cornflowerblue
#aabed8
 
#b0b7c6
cadet blue
#b0c4de
light steel blue
#b0c4de
lightsteelblue
#69778d
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey