3 Plains (shirt, tie and suit)
Great look, 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.