Whether you want to double up on your madras shirt or go with a more subtle shirt, these ties by Engineered Garments are pretty good looking. The navy blues with red and white look really nice in these patterns, which could easily go with a number of oxford shirts. Gitman Vintage also make ties in most of the patterns and materials they make their shirts in, so you can be sure to find a tie version of that great short sleeve shirt out there somewhere as well. I think this spring could see a few bow ties and neck ties incorporated into a lot of looks. There aren't too many better options than seersucker and madras in my opinion.