First time on this so go easy, I have purchased a green donegal waistcoat for the upcoming horse races and would like some opinions on how best to work it as a "separate" Can I wear this with a brown herringbone tweed blazer? Or are the colours too close? If I can which colour trousers (or pants for the ears my American bretheren) should I go with? OR Can I wear it with a charcoal blazer and light grey dress pants, light grey tie and tan shoes and belt etc? What do you guys think? Thanks!