I would go with the charcoal and white trousers myself. Purple vest might work but the shade would have to be right. I would tend more towards lilac with a hint of taupe. The tie could be yellow/gold and deep dark purple. Definitely paisley, but then I have over 100 paisley ties myself.

Well, the classic trousers for wear with morning dress are gray with black stripes, cuff-less. For the waistcoat, light gray or buff are the classic colors. For a necktie, the Macclesfield (silver with small geometric patterns) is classic. I would counsel against a paisley tie as being a tad too sporty for the occasion. However, it is your wedding. By going with morning attire, you will probably "stand out" anyway. I would counsel against the purple waistcoat unless you want to look like a clown from the Cirque du Soleil or similar vaudevillian.