First- you click on the link 'primp me'
second- before the avatar has fully loaded, click on the hair icon that lets you change hair colour/type etc
third- on the little screen just to the right of the dressing table, it will actually show the face icon instead of the hair, and the skin colour tones. DONT CHANGE IT
finally-click on the colour you want and instead of the colour appearing on face, it will on the hair.
ps- it works also on the other face features. just instead of clicking on the hair symbol, click on a different oone