Major Project - Designing

I have carried out some design development and I like where it is going. I have developed it into a waistcoat. I like the one that simple has one fold at the back, I will need to starch the fabric and it will need to be lined as the inside of the fabric is the one that is seen at the back.
I will also need to think of colour, my colour palette is dirty pink, grey and a maroon, with the blues that come from the dying process too.
I need to design an item of clothing that goes with this top.
Trousers maybe or a skirt