Very sorry to say we no longer have the paint number in our files! Many thanks for asking.

stylinc, you may want to try using an app like Benjamin Moore's Color Capture to find a close match. I just looked at it and the one I found was Butter, color #2023-60. Hope this helps!

Thanks for the tip!

You're welcome!

I looked into this a bit further. This was a project for "This Old House" a few years back and they keep a resource page on their website. Take a look at http://www.thisoldhouse.com/toh/tv/products-and-services/resources/0,,20287370-Paints~_~Finishes,00.html
for the paint colors used in the house. The photograph you are asking about is the Upper Hall and the paint is BM Philadelphia Cream.