“Day of the Dead, the mammoth Grateful Dead tribute overseen by members of the National, opens with a cover of “Touch of Grey” by the War on Drugs, offering an immediate clue to just how thoughtful this project is. “Touch of Grey” was, of course, the Dead’s lone Top 40 single, going all the way to #9 in 1987. It was also the tune that heralded the Dead as a truly mainstream phenomenon, for good or ”