<P> Color analysis (American English; colour analysis in Commonwealth English), also known as personal color analysis (PCA), seasonal color analysis, or skin - tone matching, is a term often used within the cosmetics and fashion industry to describe a method of determining the colors of clothing and makeup that harmonise with a person's skin complexion, eye color, and hair color with the benefit of being able to use this tool for wardrobe planning and style consulting . Color analysis demonstrates how certain shades are capable of being flattering or, conversely, unflattering by observing the optical illusions that occur on the face when placing specific colors next to the individual . It is generally agreed that the wrong colors will draw attention to such flaws as wrinkles or uneven skin tone while harmonious colors will enhance the natural beauty of the individual making them appear healthy and fresh - faced . </P> <P> By the 1920s, a color revolution had occurred in the U.S.A. with the development of new color industries and the possibility of producing color swatch books used as a marketing tool . Personal color analysis reached a height of popularity in the early 1980s with a recent resurgence in the 2010s after further development and promotion of different versions of seasonal analysis by image and color consultants worldwide . Seasonal analysis is a technique that attempts to place individual coloring into the tonal groupings of Winter, Spring, Summer and Autumn, or their sub-variants . However, the approach can vary greatly among different schools of thought . Some color analysis systems classify an individual's personal combination of hair color, eye color and skin tone using labels that refer to a color's "temperature" (cool blue vs. warm yellow) and the degree to which the hair, skin and eye colors contrast . Cosmetic colors are often determined by hair or eye color alone . </P>

What is the term to describe seasonal color groups and combinations