Huge Room Problem With Colors Please Help!?

So I have a brown ceiling, and i am planning to paint my room orange. But I also have blue chairs and other stuff and then i have a brown dresser and book shelf and the a black desk and head board on my bed is there a way to match it. Right now I have blue walls but once again i want orange but I don't know how to make it match. I don't want to buy a lot of new furniture.