Thanks! I'm amazed by the fit OTR.
Warning: Spoiler! (Click to show)
As others have said, the trousers are too dark as is. But I think you might have got away with them if the tie and square were very dark as well, to pull the eye back upwards rather than the two halves slicing you in half. Some would suggest that one should never have a lighter jacket than trousers, but I don't feel it's an absolute rule. But it's certainly much harder to use trousers that are darker than the jacket, requiring more effort to balance it out through the look.
Personally, I'm very, very far from convinced by the yellow trouser suggestion upthread.