What term describes color harmony that involves no colors from the color wheel?

The term that describes color harmony involving no colors from the color wheel is achromatic. Achromatic colors include black, white, and shades of gray, which are devoid of any hue. This concept is often used in design and floral arrangements to create a sophisticated and elegant aesthetic. In an achromatic palette, the focus is on the interplay of lightness and darkness, texture, and form rather than on color itself.

Monochromatic harmony, on the other hand, incorporates different shades and tints of a single hue from the color wheel. Analogous colors are those that are next to each other on the color wheel and work well together due to their similar hues. Complementary colors are positioned directly opposite each other on the color wheel, creating contrast and vibrancy. The distinction lies in the harmonious use of color; since an achromatic scheme does not include any colors from the color wheel, it stands apart from these other color harmonies.