Spencer Finch, Trying To Remember the Color of the Sky on That September Morning, 2014, National September 11 Memorial Museum.
Recalling his experience in making a small prototype of the work at ground zero; “A construction worker came by — a kind of wise guy — and looked at it and said, ‘You forgot the red ones’, ” … “someone explained to him what the work was about, and he said he had been at the Trade Center, and he walked up to one of the colors and said: ‘This is the color. This is what the sky looked like that day.’ ”
Spencer Finch, Trying To Remember the Color of the Sky on That September Morning.
An installation of 2,983 individually painted squares (one for each person who died), each painted a different shade of blue, each Trying To Remember the Color of the Sky on That September Morning.
(above quoted section from http://www.nytimes.com/2014/05/15/arts/design/spencer-finch-turned-to-the-heavens-to-honor-the-dead.html)
Pope Francis views Spencer Finch, Trying To Remember the Color of the Sky on That September Morning