Celebrity Hairstyles – We’re Loving Kourtney Kardashian With Lighter Hair Color. Kourtney K has been out and about wearing light brown tresses for a few months now, but we never really noticed her new hue until recently. The reality star / fashion mogul has kept her natural dark brown hair color for so long, It’s quite refreshing to see her with a new lively brown color. Check out the celebs new hair color as she runs errands around town. I love how natural the color looks even though her hair is now highlighted.