Baby shower cake

So in a month my brother will be having a baby shower for his baby girl that will soon be here and I have been asked to make a "show" cake  with out using pink on the cake. OMG no pink on a baby girl baby shower cake, ugh but there are other colors that I will go with maybe  purple and yellow with some black in there or something. If anyone has any ideas please let me know but I will be practicing soon so I will be showing my practices soon!