What pants can men's suits (especially formal suits) wear with dark coats? What shoes?

If it is a formal or semi-formal occasion, black, gray, white, khaki and dark blue bottoms can be used in informal occasions.

If it is a very formal occasion, the general dress code is that the color of the bottom dress cannot be lighter than that of the top dress, so it can only be matched with the black bottom dress.

Shoes can only be black or brown. Observe the three-color principle at most.

General formal occasions suit, formal suit, there is a formula.

Tri-color standard: Generally speaking, all the colors on your body should not exceed three, so it is suggested that suits should be one color, shirts should be one color, shoes, belts and briefcases should be the same color (the Trinity Law suggests that black is the best), and ties should basically follow one of these three colors and a similar color.