Chestnut Hair Color Ideas That Have Us Ready For Fall | We're nuts about this color trend. When the humidity of summer starts to wane and we get a whiff of clean, cool air – we start to get antsy for a new fall hair color to suit the season. Going dark for the fall and winter seems to be a timeless trend; nourishing those sun-soaked locks is just an added bonus as we opt for deep chocolates, dark browns, and even black. Instead of picking a monotone hue that gives little dimension to your look,