Maybe I’m a little old for this dress?” I suggested tentatively as I made my way to the mirror in the little shop.I was in the artisans’ market in San Miguel de Allende, Mexico, where they sell everything imaginable—and quite a few things I had never imagined. I was wearing a dress that had been hanging on a rack outside a tiny shop in the market. It was in my favorite colors.I’ve been collecting “my” colors, various shades of blue and green. It started with the bracelets. I bought a turquoise one for a few pesos and then I found ...