What color is Drawing, Pattern of Receding Squares ?

Source Crayola® CSS3 CSS4
#949dc5
 
#a2a2d0
blue bell
#a9a9a9
dark gray
#a9a9a9
darkgrey
#bec4d5
 
#c5d0e6
periwinkle
#b0c4de
light steel blue
#b0c4de
lightsteelblue