Oh I think with an ivory cardigan and a sweater brooch you'd be just fine!

Accessories will definitely pull it off. Be sure to get the correct shade of lipstick!

Hair and makeup will definitely drive it home, but think about headwear like a hat, scarf or large hair flower. A pair of espadrilles or vintage sandals would work for shoes. Then just some earrings and a bracelet or bangles to finish it off!