That is lovely. One of the things I've noticed: I find subtle windowpanes easier to work with in terms of pocket squares than louder windowpanes. And by "loud" I mean standing out starkly against the fabric of the jacket. I think that, when the windowpanes aren't much ligher/darker than the jacket, when you stick the pocket square in, you don't quite get the same sense of disruption.
Yeah, I used to have a medium grey suit with a pink windowpane. Impossible to find a square that works except for white linen. There's just too much contrast. If the windowpane would've been white it would've been worse.