What color is Panel ?

Source Crayola® CSS3 CSS4
#25262d
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#88939a
 
#95918c
gray
#778899
light slate grey
#778899
lightslategrey
#bdc4ca
 
#cdc5c2
silver
#c0c0c0
silver
#c0c0c0
silver