• White is a cool color that opens spaces.Living image by Raulmah?3n from Fotolia.com
  
  If you're struggling with what colors to paint your walls, think about how you want your rooms to feel after the painting is complete. Paint colors fall into categories of light and dark, but they are also warm and cool. Cool colors are calming and these colors are various shades of blue, green, violet and white. These colors are available in an assortment of tints that are sure to coordinate with any décor style.
  
  

Blue

• Blue may be the best example of a cool color, as it is the color of the sea and sky, two natural elements that are immediately relaxing. Blue is a pleasing color for bedrooms because it's calming. Choose shades of the color that you find the most comfortable. From sky blue to the palest blue, this color generates a feeling of peacefulness. Use with white molding for a balanced look.
  
  

Green

• Green is another option for a cool color on your walls. Don't just think about deep shades of green, which will create a mood of tranquility--consider other shades that might coordinate better with your décor. Pale and slightly darker shades of green bring a sense of serenity into rooms. Go for colors that feel light to you and open up your rooms for the best effect.
  
  

Violet

• Violet is an attractive option when it comes to creating a calm and cool atmosphere in your rooms. Like many other colors in the color wheel, violet comes in many shades and hues, ranging from icy hues to deep purple shades. This color works well in offices and children's rooms where bright colors are stimulating but not overwhelming.
  
  

White

• While the color white seems ordinary, it gives rooms a lift. White walls open spaces and create an open feeling, which works in any room. White is rarely white, however. It comes in different hues, from marshmallow to pearl, and you can create a soothing room with cool tones by blending these hues with your décor for the best effect.