3.3 Key Concepts of Color

Color is a fundamental element through which humans perceive and interpret their environment. It carries meaning and influences our emotions, thoughts, and decisions daily. In UI design, colors help convey information, indicate actions, prompt responses, and distinguish visual elements (W3C, 2025).

Although finding the right colors for a UI can be time-consuming, it is a critical part of the design process. For web developers, working with color involves translating these choices into functional and maintainable code. This chapter outlines the fundamental concepts of color theory.