Yeah that's what I was imagining, like a navy DB suit made from maybe a flannel or something else with a "wooly" texture and look and with some slightly subtle pencilstripes or not-too-prominent chalkstripes. Especially if the collars on the shirts are nice and spread, white would probably work best, but pale blue would also look nice.
The suit I had in mind with this is my E&R DB made of heavy duty holland and sherry twill in navy with a faint grey pinstripe. Though, I was also impressed at the way it looked when held up against my lighter weight navy herringbone suit. As for collars, I tend toward a very wide spread. I just love how a FIH on one of David's ties perfectly fills a wide collar without slipping so much as a millimeter over the day.