Sorry for the delayed response.
I am not sure on the red pants thing. I guess whatever floats your boat.
I took the contemporary to refer to both design and/or color and not necessarily both at the same time and classic is just referring to the 3 classic colors of shoes.
I would think most people would have burgundy or similar color dress shoes and I would consider that more classic than contemporary.
I’ve been using mainly brown, tan and burgundy shoes with matching belts (not a huge fan of black shoes, although did just pick up a pair of black cordovan cap-toe oxfords). With that I use gray pants in in different shades, navy pants and some dress wool pants that are kind of gray, kind of light brown-tanish. Then for socks I try to get relatively close in base color at different shades, maybe some very mild patterns.
Shirts are pretty low key, mild patterns or solids, rarely wear ties.
I wouldn’t mind being a bit bolder on the socks, but I don’t have much of an eye for picking that kind of thing. I’ve asked for some for Christmas, so we’ll see what a couple of ladies are able to come up with for me.
For blazers I just go with a navy or a brownish-gray jacket, but I don’t wear them very often.