Whilst browsing paint chips at Lowe's, I came across several that were labeled: National Trust for Historic Preservation at the top, in addition to the color name.
Wouldn't you know, I ended up with a gallon of National Trust for Historic Preservation Mark Twain Gray Brick (#4005-2).
I looked it up at home:
"The National Trust for Historic Preservation has worked extensively with Valspar® to develop an exclusive collection of historic colors documented from historic sites across the country. The resulting palette, sold exclusively at Lowe's, features over 250 historic colors which generate much needed revenue to support our efforts to help people protect the historic places that matter to them."
Whoa. I thought the label was just a whimsical and poetic way of saying a vintage-y color, popular in America back in the day. And, yes I guess that's true too. But it's a paint color actually found on Mark Twain's pad. Cool.
Check out Mark Twain's house! Every which way I squint though, the brick looks red to me. But maybe it's the dark gray on the walkway?
Anyway, I don't think I could have chosen a better home to emulate from the list. Well, except maybe, Lincoln's Cottage. That would've been rad too. Here's a full list of the historic paint colors.
UPDATE: Coincidentally, it is also the Centennial if Mark Twain's Death on 4/21. There's going to be a seance! spooky.