The third dimension of color is intensity. It is also referred to as saturation purity or chroma. Intensity defines the strength or weakness of a color or its brightness or grayness. Color wheels are often used to assist gardeners in planning appropriate combinations in the garden. Color wheels can be purchased at art supply stores or paint stores.
Color wheels can help gardeners visualize various color harmonies.
A monochromatic color scheme means that all the flowers are the same color or differing values of the same color. A true monochromatic scheme can create a feeling of spaciousness because the eye is not interrupted by another color. However, a scheme where everything is the same color can get boring. By introducing lighter and darker versions of the same color we add interest to the garden. An analogous color scheme uses colors next to each other on the color wheel.