The study looked at two modes of warm shift: high CCT, which meant that the screen colors were intensely shifted to the warmer end of the spectrum; and low CCT, which meant that there was only a slight warm shift.
It's maybe a little warmer tone in one direction, maybe towards the Sun, and cooler tones, grayer tones, looking in other directions, but not so colorful.
For example, warm colors like red and orange are often associated with energy and excitement, while cool colors like green and blue create a sense of calmness and relaxation.
By the way, if you'd like to learn more about cool colors, warm colors, and related terminology, as well as how to leverage these concepts in your outfits, you can find our video on the color wheel here.