Colour is unavoidable fact of reality ,even if you want to work only neutrals.
This is even true if you want to use only white.
White has tints of other colours.Working out the perfect white room requires an understanding of the properties of colour on a subtle an expert level.The eye always need to differentiate objects.
You can make a space more intimate and bring walls forward using bright or dark colours.The use of colour is an opportunity to create balance in a space and it has its own inherent rules.
The way colour affects mood and the proportion of its use can be a major contributor to the total harmony of a space.
Everyone wants to feel good at home.Knowing which colours sit happily together and which add sense of harmony is important.
Using colour to its full potential is far more than matching the cushions with the curtains.