What is a metameric shift in the context of color appearance?

A metameric shift refers to the phenomenon where an object or textile displays one color under one type of lighting and a different color under another type of lighting. This occurs because the way colors are perceived is influenced by the spectral composition of the light source and the characteristics of the material itself. In practical applications of interior design, it’s essential to consider how different light conditions—such as natural daylight, incandescent bulbs, or fluorescent lighting—can alter the way colors appear in a space. This understanding allows designers to make more informed decisions about color choices, ensuring that the intended colors of a fabric or paint will look consistently appealing in the environments where they will be used.