Avoid painting an entire room bright yellow. Instead, use light yellow in a small areas for accent. Green reminds us of of grass, gardens, fields and forests. Surround by them, we feel calm and refreshed. The relaxing effect of greens is welcome in bedrooms, bathrooms and areas where peace and tranquility are desired.
Greens also help bring nature indoors, making a hot, sunny room seem cooler.
Blue makes us think of clear skies and placid lakes. Like green, its effects are calming, so it too is appropriate for personal spaces where you plan to relax and rest. If you're on a diet, eating areas should be blue, because the color suppresses the appetite. But blues are not recommended for living rooms and great rooms because they encourage people to relax instead of interact. White allows openness, airiness and an expansive spirit.