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Emotion is assumed to be stored in long-term memory as a concept by a feature (e.g., “tears” for “sadness”) that is a memory unit of a concept. Memory activation of emotion concepts via features is supposed to enable recognition of emotional states. Emotion concepts are associated with various perceptual features oriented toward the interior and exterior of the body. Although previous studies have revealed that internal perceptual features need to recognize emotional experiences, how external perceptual features contribute to memory representation of emotions is unclear. This study focused on sadness and aimed to identify how color, which is an external perceptual feature, represents sadness in long-term memory. We hypothesized that colors continuously represent positive and negative aspects of sadness. Participants rated the congruency between each of 99 color visual stimuli and five major emotions, six sadness-related situations, and five psychological properties. Consistent with the prediction, two bluish color groups appeared to represent sadness based on emotional congruency ratings. Colors with the highest sadness ratings were related to dark and dull bluish ones. On the other hand, lighter bluish colors mixed with green appearance were similarly congruent with both sadness and happiness. The lightness properties of these sadness-related bluish colors continuously represent sadness dominancy (sadness rating minus happiness rating). Additionally, sadness dominancy of each sadness-related color group was differently associated with sadness-related situations. These findings indicate that color features contribute to memory representation of sadness in association with situations and that color features continuously instantiate negative and positive aspects of sadness.

Color features continuously represent negative and positive aspects of sadness