Before you start picking colors, you need to understand some basic principles of color theory. Color theory is the study of how colors interact, contrast, and harmonize with each other. It can help you create a balanced, cohesive, and appealing color scheme for your brand. The color wheel is a circular diagram that shows the relationship between primary, secondary, and tertiary colors and can be used to find complementary, analogous, triadic, or tetradic color combinations that work well together. The color temperature refers to how warm or cool a color is - warm colors like red, orange, and yellow tend to create a sense of energy; while cool colors like blue, green, and purple tend to create a sense of calmness. Additionally, the color value refers to how light or dark a color is; by adding white (tint), black (shade), or gray (tone) you can adjust the value of a color which can affect its mood, contrast, and readability.