A Cohesive Home | Color Palette
In her book Homefront; Design for Modern Living, Windsor Smith gives readers the following advice on color palettes for your home: "If you keep colors restricted to five or less, they can be repeated throughout your design, creating a cohesive look between rooms... you will create a pleasing connection and a sense of rhythm, as well as a continuous thread running throughout your home that will unify the space."
I've heard this advice from other designs as well, though not with five colors specifically, just to reuse a specific color throughout your house for a unifying whole. I honestly think this is something most designers do subconsciously. If your design has a strong concept from the beginning, that concept will include a color palette. The challenge is when we design in a piece-meal way, one room at a time or one item at a time. It takes more effort and awareness to make your home look pulled together when this is the case.