What color is Drawing, Aqua Tower, Chicago, Illinois, USA: Study Exploring Chromatic Strata, ca. 2005 ?

Source Crayola® CSS3 CSS4
#e7eeca
 
#eceabe
spring green
#faebd7
antique white
#faebd7
antiquewhite
#afbaa2
 
#b0b7c6
cadet blue
#a9a9a9
dark gray
#a9a9a9
darkgrey
#868665
 
#8a795d
shadow
#808080
grey
#808080
grey