Blue on blue, done well. A paisley print worked in shades of cornflower and deep sea, bordered on all four sides so the design holds its shape however you fold it.

The natural partner to a navy suit, though it is far more interesting than a plain white square and far less obvious than a matching tie. Try it with grey flannel, or with a light blue shirt and no tie at all.

Silk, and an easy gift for a groomsman, a new starter, or a father who insists he needs nothing.