just ordinary edible food colour from the supermarket 
and sugar XD
and sugar XD
yea but what in the layers xD and is it whipped cream on top? and what the hay is those streamer lke this that looks like sour jerky??
aw no i get it.. the day after party my brain not woriking. marzipan and strawberry jelly in the dark blue layer and the cream is my fav. cream for cakes: whipped cream a bit of sugar, vanilla and quark (insert english word here XD?)
culd you maybe make a recipe? I old love to try it xD
+ those rainbows things around the cake is sweet sour candy stuff i found while i was searching for food colour.
ok no prob. i send you ah note have to translate it 
have to translate it