I like Navy Blazer. It is a very versatile jacket because you can wear gray, charcoal, tan, khaki and brown Trousers with it. It is a neutral colour. To complete your wardrobe, I will pick up 3 pair of trousers from the above colours. You can also consider a pair of brown shoes when wearing a navy blue blazer and tan trousers.

Besure that you match your belt to your shoes.

As for shoes, I am not a big fan of loafers. I like square toe with laces. make sure the shoes are polish before you leave the house.