Yeah, some deep black jawns would do great things for that outfit.
But wait, now that I think of it, wearing only grey garments that are a shade or two apart would be a wonderful counterpoint to this cluttered colorful world we live in. Everyone's concerned with color coordination, wearing the right things, does this jacket match my trousers, is this mauve tie okay or should i go with green, and here you are, a grey shape drifting through it all. Get some grey boots and your status as The Human Cloud is sealed.
For those of you who were interested, you can sorta see how the cut-job turned out for the sleeves. I don't think it makes the jacket look any better (in fact, I kind of think it's a bit weird looking), but it enabled the tailor to take in the sleeves without fucking with the shoulders of the jacket. All I had to do was show Gary the photo that someone else had originally posted here and voila.