When all of the colors in a room match up as variations on a single shade you get an integrated effect which is quite lovely. However this effect lacks a certain amount of power. It is calm, and comfortable, but it isn't inspiring.
Contrast is when two matching colors violently oppose one another. This obvious animosity, even if it is merely personification, makes a space seem more alive. Our eyes are drawn, inexorably, to such palettes.
The attraction comes from the fact that the effect is visually stimulating. When we see a deep red next to a dark green, or a soft yellow contrasted with a sky blue, our eyes are stimulated by the opposing tones, and drawn in by the fact that they actually compliment one another.
The power that can come with contrasted colors is used to good effect ion places where it is important to maintain a certain amount of drama in the atmosphere, such as in an opera house, a theatre, or a royal palace.
However you probably don't live or work in an opera house, so you should be cautious that you are not using too much contrast in your space.That high level of energy, the drama, the visual passion, can actually make a space rather uncomfortable, if you have to live and relax there on a day to day basis.
On the other hand if you are a creative person, having an office that has sharply contrasting colors may actually be an inspiration to you. Another positive effect of this is that all of that energy will be intimidating to people who are not used to it, which may give you an advantage over your competition.
Contrast is an important decorating tool that you should not neglect. Use small items which have dramatic shades and tones, contrasted against softer backdrops, to add excitement to an otherwise drab space.As long as you are balanced in your methods, this can be a great way to add some inspiration to your home.