▁( for ▁sing ers ▁and ▁prost it utes ), ▁other ▁colors ▁are ▁popular . The ▁way ▁to ▁we aring ▁k h ă n ▁v àn h ▁in ▁the ▁Imperial ▁City ▁of ▁Hu ế ▁is ▁different ▁from ▁the ▁way ▁to ▁wear ▁k h ă n ▁v ấ n ▁of ▁ Đ à ng ▁N go à i . ▁Hu ế ▁k h ă n ▁v àn h ▁is ▁worn ▁with ▁the ▁edge ▁of ▁the ▁k h ă n ▁v àn h ▁facing ▁up wards ▁inside ▁the ▁ring . ▁The ▁second ▁ring ▁is ▁attached ▁to ▁the ▁outside ▁of ▁the ▁first , ▁rather ▁than ▁under ▁the ▁ring ▁like ▁in ▁the ▁North . ▁ ▁Kh ă n ▁v àn h ▁d â y ▁( form al ▁for ▁females ) ▁An ▁formal ▁style ▁of ▁k h ă n ▁v ấ n ▁for ▁female ▁is ▁k h ă n ▁v àn h ▁d â y ▁or ▁m ũ ▁m ấ n : ▁U sed ▁on ▁formal ▁occasions . ▁The ▁very ▁long , ▁thick ▁cloth ▁was ▁wrapped ▁around ▁the ▁head ▁like ▁a ▁fun nel . ▁The ▁traditional ▁k h ă n ▁v àn h ▁d â y ▁is ▁recorded ▁in ▁dark ▁blue ▁color . ▁Only ▁on ▁the ▁most ▁important ▁occasions ▁did ▁one ▁see ▁a ▁yellow ▁k h ă n ▁v àn h ▁d â y ▁in ▁the ▁inner ▁of ▁Imperial ▁City ▁of ▁Hu ế . ▁In ▁addition , ▁from ▁the ▁em press ▁mother , ▁the ▁em press ▁to ▁the ▁prin cess es ▁also ▁only ▁wore ▁the ▁dark ▁blue ▁k h