Source Crayola® CSS3 CSS4
#95afbe
 
#a2add0
wild blue yonder
#a9a9a9
dark gray
#a9a9a9
darkgrey
#637481
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey
#3b454d
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey