What color is Button ?

Source Crayola® CSS3 CSS4
#2d291e
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#4c4935
 
#414a4c
outer space
#556b2f
dark olive green
#556b2f
darkolivegreen
#857f79
 
#757575
sonic silver
#808080
grey
#808080
grey