I used 3 balls of Rowan kid silk haze in a mauve/grey/lilac colour. I could have used two but I wanted a larger version and this yarn is so unbelievably light and 'fluffy' (to quote No 3) that a big shawl doesn't 'feel' big and heavy on your shoulder/neck.
I added a one-row edge in a perle cotton I had in my stash. By some serendipitous fluke the colour match completely and I love how the edge now shines and lifts the whole garment.
They were made for each other, don't you think?
(and let me tell you... the way the weather is going at the moment... I'll be wearing very soon!)