The Princess of Wales’s tumbling hair always turns heads—and fills up Pinterest inspiration boards—but this week, her chosen shade felt decidedly more autumnal against her wardrobe of forest greens and rich blues. While attending a series of engagements over the course of a three-day state visit from the Sultan of Oman, the Princess—who usually visits Chelsea’s Richard Ward salon for her hair color—has unveiled more golden-toned lengths, with subtle waves adding to the glossy finish.

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It’s a seasonally-appropriate hue that Siobhan Haug, a color specialist and founder of Haug London Haus salon, predicts will come to reign supreme as we head into the colder months. She calls it “teak brunette,” inspired by the tones of teak tree timber in all of its honeyed, golden glory. “On hair, it translates into a medium-to-dark brown with golden, tawny undertones,” Haug continues, “and it moves from sun-warmed gold to a deeper, softer brown, much like teakwood itself as it matures.”

In fact, woody brunettes with soft, botanical undertones are currently among the most-requested colors at Haug. “There’s something sophisticated about shades like this thanks to the balance of depth, which highlights warm undertones without a trace of brassiness,” said Haug.