The color model is an abstract mathematical model describing an approach to represent colors by tuples of numbers such as RGB or CMYK Kaur Sahib 2015. Color space is a specific organization of colors. Each specific color model can have different color spaces. Color space is represented in a three-dimensional coordinate system. In the three dimensional systems, each color is represented by a single point. To apply color as a visual cue in computer vision applications image processing and multimedia an appropriate approach to represent the signal of color is required. Color space provides a reasonable approach to recognize order affect and effectively display the colors of the object taken into consideration. The problem's declaration and solution can be addressed by choosing a suitable color model. The knowledge about the way color signals generated and what information needed from the color signal is important during the color model selection process.
It would be a mistake for the designer or typographer to rely on what is on the screen when designing for print, especially when minute adjustments and attention to detail are so important. Proofs should be printed to ensure the final outcome is as intended as the screen cannot promise to display the correct colour resolution, character shape and spacing that is intended by the designer Gordon 2001. Upon mentioning colour it is also important to discuss how it affects legibility and readability when combined with type. It is a common belief that the most legible color combination for typography is black type on a white background. Although, this theory may stand to be true evolving printing and digital screen technologies can now offer alternative combinations that can match, if not exceed legibility. The legibility of type can be drastically affected for the better or the worst when color is incorporated. Depending on the nature of the content the appropriate contrast between the type itself and the background it sits on is paramount Maxa 2015. Hue is another name for color as is tone Value represents how dark or light colour may be and saturation refers to how bright a color is.