Source Crayola® CSS3 CSS4
#cbdfe1
 
#c5d0e6
periwinkle
#dcdcdc
gainsboro
#dcdcdc
gainsboro
#a3b2b8
 
#b0b7c6
cadet blue
#a9a9a9
dark gray
#a9a9a9
darkgrey
#4a4f5b
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#737a83
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey