Source Crayola® CSS3 CSS4
#515c63
 
#4a646c
deep space sparkle
#696969
dim grey
#696969
dimgrey
#687d8a
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey
#613736
 
#714b23
raw umber
#556b2f
dark olive green
#556b2f
darkolivegreen
#2f3f3b
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey