Final answer:
Harmony in visual design can be achieved by using analogous colors or similar shapes, which creates a cohesive and balanced visual experience in a space.
Step-by-step explanation:
Harmony can be obtained by using analogous colors or similar shapes in a space. This harmonious effect is achieved by selecting colors that are next to each other on the color wheel, which blend together smoothly and create a visually cohesive composition. In the context of art and design, this principle can be seen in works where the artist, such as in the example of 'Untitled (in honor of Harold Joachim) 3 (6.8.6),' uses a specific arrangement of colored light tubes to produce a soft glow and coherent visual experience. By grouping colors and shapes that are alike, artists can guide the viewer's eye around the artwork and establish a sense of order and balance.