Studies have proved that colours affect the mood of a person. Colours have a psychological effect and are instrumental in communicating emotions, inspiring, soothing, and energizing. Therefore, the colour of your bedroom walls affects your daily mood.
Some colours will make your room warm and cosy, whereas some can make your room calm and soothing.
I personally don’t think it is neccesary to engage a Feng Shui Expert to decide the colours for you. But, I feel it is important that you have a basic understanding of what colours will give what kind of effect. You should decide first, what kind of mood you would like have for your room. Then second, choose the colours that will give that effect.
This article, Bedroom Wall Colours and How It Affects Your Mood will help you have a better understanding of the different types of room colours and its effects on your general day to day mood.