Scientific tests prove that after exposure to colour, we experience physical, mental and emotional changes (except for black, white and grey). It can be as drastic as changes in blood pressure and body temperature. It affects our perception of space and can even have an affect on our appetite and mood.
Psychologists are well aware of the benefits of using colour to evoke feelings. For example, orange stimulates the appetite, making it an ideal colour for the dining room. Blues are ideal for bedrooms and studies, creating a calming and relaxed environment. Chocolate is a comforting colour, making us feel warm and safe.
Sometimes people relate colour back to an experience, feeling or even a holiday they took. Yellows conjure up images of Hawaii from the Hibiscus, while Magenta takes you back to your last visit to Santorini!!
When selecting colours that surround you, ensure you choose colours which will suit your lifestyle and your surrounding environment.
Avoid a bland room by incorporating a bold colour as a feature panel or wall. Tie through accessories that support that feature colour by way of a vase, cushions or throw.
Or, if you prefer to stick to neutral tones on the walls, break it up with some earthy, tactile pieces such as woven baskets, cashmere throws and linens.
Light plays a big part on colour also. Whites can reflect about 80% of the light it receives, making it sometimes cold and clinical whereas reds absorb light, creating a warm, cosy mood. Also remember that the more strength (hue) there is in a colour, the more it tends to make a space appear smaller, whereas cool, tonal colours can open up and refresh a space.
Reference : Freedom.com