T-Shirt for Dwell Cardigan?

Hello all,

This is Christmas I got a Dwell Cardigan from AllSaints:

AllSaints Dwell Cardigan | FashionBeans

I would just like to ask what would an appropriate color be for a T-Shirt with this cardigan?

Regards,

Any colour under the sun. Just not oatmeal. Its one of the basic colours so it goes with absolutely bloody everything.