Theme gardens based on a particular colour or combination of colours are currently very popular. One of the most effective colour themes is the combination of white flowers against a background of silver and dark green foliage. The overall effect is cool and harmonious. For a more dramatic or 'tropical' feel, try combining shades of yellow, orange and red. A sense of depth or distance.
Warm colours tend to draw the eye.
Placing them towards the front of the bed, will make the garden appear shorter. Cool colours recede. If they are placed in the foreground, the bed will appear to be deeper or longer than it really is. A feeling of distance can also be created by repeating drifts of warms colours followed by cool colours throughout the garden. A splash of vivid colour is always an eye-catching feature in the garden.