But the jacket's color palette is autumnal, despite the yarn composition, and you're wearing (what looks like) flannel pants. I think a grenadine would have been better if you're looking for more texture - I don't know, shantung just says summer to me but it may be a personal bias. I would have picked a fall colored silk or wool/cashmere tie myself with this outfit. The shirt also looks great.
Agreed, grenadine would have been valid as well. Good point.