The great thing about flowers is that you really can't go wrong with them. Even if a perennial bed doesn't turn out exactly like what you envisioned, chances are it's going to be attractive. You can find nearly every color of the spectrum in flowering perennials. Let's take a look at some popular perennial plants, and see how different color combinations can set different moods. Pastel colors look best when viewed from relatively close up, and they can looked washed out in the harsh mid-day sun.
Bright colors hold up well to brilliant sunshine, and attract the eye even from a distance.
Tenor Phlox Dwarf Gaillardia Tricia Carnation Complementary Colors Colors that are opposite on the color wheel are described as complementary. High in contrast, complementary colors add creative energy and vitality to a garden. These color combinations tend to be gentler on the eye than complementary colors. A harmonious color scheme unifies a garden, while allowing enough range of color that it doesn't become monotonous. If you are concerned about your ability to choose colors, a harmonious color scheme might be a good starting point for you.