If you plan to wear the above, you should also pack a light shirt, dark trousers, a few ties.
You can probably get-away with what you have; however, my suggestions would be more conservative:
I. medium/dark grey trousers with brown jacket, light blue shirt, navy tie
II. navy trousers with grey or brown jacket, light blue or striped white shirt, navy or grey tie
I have been to three weddings this year and the dresscode of the main wedding guests has varied from: everyone suited-and-booted, some men in jeans and sports jacket, and a second-cousin (in mid-30's) turning up in Addias sport shoes and tracksuit bottoms.