People may undertake an interior design project for any number of reasons, but there is often a psychological and emotional undercurrent to it; changing the environment in which you will spend each day will generally affect your mood quite directly. Wise decorators always take the relationship between design and mood into account when organizing a new space, never forgetting that even the most subtle detail – like the color of a wall, or the distance between a table and a chair – can impact how we feel. One such mood that you can try to create in your home is a bright, happy one that will help lift your spirits. The following hints are just some of the ways you can create this positive vibe with the décor in your house.