Tau Commission, Objective marker. w.i.p.

Ive been commissioned to paint a Tau commander in some specific colours. Ive been waiting too long for this to come into the shop, but in the meantime I thought I would have stab at the colours the customer wants. I had this Tau Tower lying around for years and thought it would make a great objective marker. Here is a w.i.p shot of the yellow the client wanted. Preshaded with purple. The main body of the model will be very dark blue so I thought Purple was the ideal colour to pre shade the yellow. Of course this will be given to the client as an extra bonus for his patience. A freebie :)