I am rubbish at telling the difference between dark colours and blacks. Something about missing cones or not enough carrots… this leads to great frustration as I always seem to mismatch my dark blue and black socks (they spawn; I have hundreds).
Little Miss Matched has the perfect solution… they sell nothing but odd socks, so you can finally remove all the uncertainly and be confident that people will know that – yes, you meant to wear odd socks. It’s designed for girlees, but they have a men’s section too – huzzah!