What color is Book Cover, Civilization on Trial and the World and the West ?

Source Crayola® CSS3 CSS4
#653c7d
 
#58427c
cyber grape
#483d8b
dark slate blue
#663399
rebeccapurple
#8c4644
 
#9c2542
big dip o' ruby
#a0522d
sienna
#a0522d
sienna
#34262c
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#562e48
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey