Hi Bill,
Wow, it's been 9 years since I painted the backdrop...but I still have the paint chip!! It's Bay City Blue using a Dutch Boy chip.
I attached several photos. The first is a close up of the backdrop with clouds and lighter bottom area (years after I worked on the backdrops). The others show the paint chip, gallon with dry painting drippings on the side, and the chip against the backdrop. I put the chip on the backdrop and side of the paint can, because it appears the chip is darker than the paint. I don't recall if I lightened the paint with some white, but it's easy to do to your liking and room lighting.
Hope this helps,
Michael
