What color (and fabric) trousers with: Brown tweed jacket Brown corduroy jacket Charcoal gray pinstripe worsted jacket And how about the jacket with dark brown corduroy or wool trousers?
(1) Tan garbardine wool, mid-grey flannel, dark grey flannel possibly, jeans. (2) Tan cotton twill, mid-grey flannel (depending on the style of the cord coat, and where you are wearing it), tan garbadine wool (possibly), jeans. (3) I'd say jeans only, and possibly brown cords or brown cotton canvas. Looks too odd to wear as a business dress blazer.