Once you have chosen the time and location, you need to think about how to use color theory to create harmony or contrast in your photo. Color theory is the study of how colors interact and affect each other and the viewer. One of the most useful tools of color theory is the color wheel, which shows the relationships between the primary, secondary, and tertiary colors. You can use the color wheel to find colors that are complementary, analogous, or triadic, among other schemes. Complementary colors are opposite each other on the color wheel, and create a strong contrast when used together. For example, blue and orange are complementary colors, and can create a striking contrast in a desert photo. Analogous colors are next to each other on the color wheel, and create a harmonious and natural look when used together. For example, yellow, orange, and red are analogous colors, and can create a warm and cozy feel in a desert photo. Triadic colors are evenly spaced on the color wheel, and create a balanced and dynamic look when used together. For example, green, purple, and orange are triadic colors, and can create a vibrant and lively feel in a desert photo.