Combining suits, ties and shirts
3 Plains (shirt, tie and suit)
Very current. Best if there is some relationship between the colours, e.g. Navy blue suit, pale blue shirt and medium blue tie. The contrast/blend and tone will depend on what is right for your colouring.
2 Plains/ 1 Pattern (Plain suit and shirt, patterned tie)
Interesting variation, try to have some link in the colour scheme. It is difficult to work with two different colour stories.
2 Patterns/1 Plain
Most common combination for business, works best if colours relate. (striped suit, plain shirt and foulard pattern tie). If wearing a patterned shirt, you are perhaps better to go for a plain tie.
E.g. birds eye suit, striped shirt and woven tie. Difficult to pull off, unless the colours are well co-ordinated. If you manage it you will look very stylish.