What color is Book Cover, The Romantics: An Anthology of English Prose and Poetry, by Geoffrey Grigson ?

Source Crayola® CSS3 CSS4
#346940
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#396471
 
#4a646c
deep space sparkle
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#34645b
 
#4a646c
deep space sparkle
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#1f3236
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#b4bfc0
 
#b0b7c6
cadet blue
#c0c0c0
silver
#c0c0c0
silver