The Prince of Wales of the 1920s authorized combining suits and suede finish shoes. As I understand it, the PoW paired a medium or light grey flannel suit with brown oxford buckskin shoes.

Nowadays, suede finish shoes have spread to worsted blue and grey suits. While I recognize that few dressing rules and norms apply anymore, I do find the combination off now and then. The smooth worsted and the “dirty” suede become an odd couple easily.

I like how the man on the left in upper photo approaches the configuration. Instead of the common brown suede shoes, he sports a pair of black suede monks with his striped navy blue suit.

Another solution, if you prefer brown suedes, is choosing a French blue or lighter blue suit. It makes the suit less formal, and it brings it closer to the nature of brown suede.

Source: The Journal of Style in Italy