Help me accessorise maternity dress for wedding please.

[chickenfactory]

m.asos.com/mt/www.asos.com/ASOS-Maternity/ASOS-Maternity-Grecian-Maxi-Dress-With-Ruffle-Shoulder/Prod/pgeproduct.aspx?iid=2740670&cid=8343&Rf-200=33&sh=0&pge=0&pgesize=12&sort=-1&clr=Navy

I've got black/silver/nude shoes but nothing else.

What time of year is the wedding?

Hair -[ [http://uk.accessorize.com/view/product/uk_catalog/acc_2,acc_2.12/3861550800 here]]

Shoes - here

Bag - here

Shawl - here

Hair - here

Bump

Thanks rupret, I take it silver will be best colour? My mum has a bag I could borrow very similar to the one in the link.
Mrs - it's in April.

Silver and navy look lovely.

Tbh though most colours look great with navy!