An old designer's rule called 60-30-10 which when applied will always be harmonious - 60% of a dominant color; 30% of a secondary color; 10% of an accent color. This rule guides you in choosing the right amount of colors to make the room balanced and cohesive.
To blend a variety of colors best is to choose a neutral wall paint otherwise pick the color scheme from the largest pattern in the room. Repeat the largest color palette a few times in the room to help connect everything together, but never use equal amount of the colors in the room.
source: http://www.hgtv.com/painting/color-theory-101-analagous-complementary-and-the-60-30-10-rule/pictures/index.html
To blend a variety of colors best is to choose a neutral wall paint otherwise pick the color scheme from the largest pattern in the room. Repeat the largest color palette a few times in the room to help connect everything together, but never use equal amount of the colors in the room.
