What color is Poster, Bayerisch Staatsoper, Siegfried, Richard Wagner ?

Source Crayola® CSS3 CSS4
#88abe1
 
#a2add0
wild blue yonder
#87ceeb
sky blue
#87ceeb
skyblue
#6f798f
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey