The most common mistake I see among aspiring designers is the under-estimation of the color white. (Technically, white is the absence of color, but we can use shades of white to paint our homes). The reason I mention that white is the absence of color is that it is important to understand that all white paint has a “tint’ to it. So when you go to Home Depot to pick out your white paint you might be tempted to get the brilliant white paint. This paint contains a blue tint that will give most rooms a dull grey cast to them. You generally want to steer towards a white that has a pink undertone to achieve that bright white contrast that feels warm and welcoming.
Another important aspect of white to understand is that white will always expand and lighten a . This means that small rooms are going to feel larger when they are painted white than say a red color. It also means you should steer away from vibrant or dark colors in small rooms or rooms with poor lighting as they will appear smaller.
One last thing I want to point out about the color white is that lighter colors, i.e. the closer you get to white, the more these principles apply. This means that even small dark rooms can look amazing with colorful walls. You just want to steer towards a lighter color such as a light yel or taupe.