Due to these issues, we feel the effective use of color in computer interfaces is an important HCI topic that needs to be examined when considering interface design. Fundamentals of Color To understand the potential of color in interfaces, we need to examine some fundamental characteristics of color perception. The primary fundamental characteristics we discuss here include various color models, the human visual system, physiological principles of color, and color effects such as illusions and color combinations. As you might guess from these names, the first is organized similarly to the way we perceive color, and the second is based on the characteristics of a display device. Hue is the spectral wavelength composition of color that produces the colors we see, such as orange, blue, etc.
Value is the strength or darkness of the color.
Lightness , also referred to as brightness, refers to the amount of light energy creating the color. CIE is a precise spectral measurement used to pinpoint colors and remove color ambiguity. This fact can explain some of the difficulties encountered when we try to recreate just the right color for an interface screen. It is not always possible to get the exact shade. The human eye contains a lens and a retina.