I think a burgundy tie goes well with that jacket, and somewhat well with the shirt. A solid silk repp tie is an easy place to start. Dark-coloured shirts are difficult to wear well with ties. If you need to dress conservatively for business, you'll need a lighter-coloured shirt that's no darker than french blue. The shirt is what's giving you trouble. I'd save the dark blue shirt for when you'll be going without a tie and wear a white, ecru or light blue shirt when you're wearing a tie.