Source Crayola® CSS3 CSS4
#524f4a
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#a09992
 
#95918c
gray
#a9a9a9
dark gray
#a9a9a9
darkgrey
#7b756a
 
#757575
sonic silver
#696969
dim grey
#696969
dimgrey