This is a close-up of a 2-2 keystone navy double-breasted Gieves and Hawkes that I got on eBay. The colors of the overchecks are slightly cooler than they appear here. Anyway, you see the difficulty. What amounts to turquoise and somewhere between maroon and magenta isn't easy to coordinate.
Cool, muddy colors like muted gold and blue seem to work reasonably well. Paying attention has made me better at color, but this is still one that I can't figure out without physically holding the potential tie up to the suit in good light. You're never too old to get back to the basic skills.