Will these be too matchy-matchy?
I do like your outfit, D. IMO, you pull it off quite well.
Stole the "brown jacket/mustard cords" combo shamelessly from a great fit David Reeves put together a week or so ago. His was smarter overall, and the colour of his somewhat more orangey cords worked a bit more harmoniously into the overall palette, plus I didn't fancy using an ascot, but this was the iteration I mustered up. I like my version, in the main, but without an ascot, I think it needs a dark brown or burgundy tie instead to lift it, and then perhaps a slightly different square.