Source Crayola® CSS3 CSS4
#55574d
 
#414a4c
outer space
#556b2f
dark olive green
#556b2f
darkolivegreen
#b6b4a7
 
#b0b7c6
cadet blue
#a9a9a9
dark gray
#a9a9a9
darkgrey
#717265
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey