I received this question from a reader:
What is the rule on sock color?
This is what I shared with them:
Socks, when visible, act as an extension of the trouser leg. Choose a sock color in a shade that blends well with your suit fabric.
Matching suit to sock eliminates calling attention to the ankle in those moments when the trousers’ movement reveals the sock, such as when sitting or walking briskly. Trousers should be cut long enough to cover socks at all other times.