Deb, you are great! Yesterday I received a parcel with a selection of different papers, and a copy of Oru Volume #4.
Amongst the paper were some 15cm squares of "dreamy colour origami", which Deb suggested I use to fold a 5-stage hydrangea. She said I might be pleasantly surprised, and indeed I was! The colouring on the paper results in layers that have different colours.
Paper: 15cm square of kami
Model: 7.5cm by 7.5cm