Cardamom, Indonesian Vetiver, Wood. Dark Wave is meant to envelope you and protect you from melancholy. -9 ml. Founded in 2009 by self taught perfumer Heather Sielaff, each Olo fragrance continues to be hand blended and bottled to order in her studio in Portland OR. OLO Fragrance blends contain fractionated coconut oil, essential oils, key accords and absolutes.