You spent hours choosing the perfect paint color and covered every wall with care. But years later, a touch-up is needed—and you can’t remember if the shade of green was Phantom Mist or Dinner Mint.

Just like a martini, olive green has earned its status as a classic. Nestled on the color spectrum between yellow and green, it's a decidedly earthy color; it's lived-in, and just the right amount of ...