Source Crayola® CSS3 CSS4
#56524a
 
#414a4c
outer space
#556b2f
dark olive green
#556b2f
darkolivegreen
#777267
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey
#9f9d8f
 
#95918c
gray
#a9a9a9
dark gray
#a9a9a9
darkgrey