This term indicates Huangfu Shaohua has an elegant appearance. This description comes from the fact that women in traditional Chinese society would use the qingdai 青黛 [natural indigo] power made from various kinds of plants to draw their eyebrows.
Picture of qingdai powder. See more details about qingdai at https://sys01.lib.hkbu.edu.hk/cmed/mmid/detail.php?pid=B00413
