Which color model is commonly used in printing?

The CMYK color model is the standard used in color printing because it is based on the process of mixing ink. CMYK stands for Cyan, Magenta, Yellow, and Key (Black), which are the primary inks used in color printing. This model works by subtracting varying percentages of these colors from white light to create the images and hues needed for printed materials.

Unlike the RGB color model that is primarily used for screens (which stands for Red, Green, and Blue), CMYK is specifically designed for the color mixing techniques employed in printing. RGB combines colors of light to create various hues, making it suitable for digital displays where light is emitted directly. Since printing involves absorbing light rather than emitting it, the subtractive nature of the CMYK model is more effective.

The HSV and HSL models, which represent colors in terms of hue, saturation, and value (or lightness), are predominantly used in digital graphics and image editing for intuitive color selection and manipulation, rather than being directly applicable to the printing process. Thus, CMYK is the model that aligns with the requirements of printing, making it the correct choice for this question.