On average halfbreeds tend to have a darker skin tone than drowussu but lighter skin tone than drwolath. In Chel'el'Sussoloth, halfbreeds are a very small minority and often find themselves trapped between two worlds since the fall of the Dutan'vir. Because of their rarity and exotic skin tone, halfbreed slaves are seen as increadibly valuable.
Note: All Tei'kaliath are technically descended from mixed blood, albeit from the joining of dark elves and light elves on the surface. However, Tei'kaliath heritage is predominantly more dark elven than light elven. link