Interesting question, which I believe I can answer from my own experience. I have a pair of widewale corduroy trousers (Polo rather than RLPL) in a bright red-orange that is perhaps not dissimilar. I can't say I wear them more than once or twice a year, but when I do, they look quite smart with a pair of black Pliner slip-ons which happen to have a heel cushion (as I believe it's called) of the same red. This detail becomes evident only when I'm seated but it provides a nice touch for those who may notice. Now that I think of it, I also have a pair of raisin-brown (almost cordovan but darker) monkstraps that would also work well. I agree that brown suede, which is not yet represented in my collection, would be very successful depending on the shade. I think the more important point is not to fear color. I believe in embracing color, and am never so happy than when sporting garments in heretofore unseen (but not necessarily loud) combinations.