A three-dimensional color-emotion space was developed for two-color combinations. This space has the same axes as those developed for single-color emotions (i.e., color activity, color weight, and color heat). This indicates that the two-color emotion spaces have the same framework of color-emotions. (Ou et al., 2004)

The findings of this study show that people in general perceive color emotions for multicolored images in similar ways, and that observer judgments highly correlate with the predictive model recently proposed in image retrieval. Images were judged by observers on three emotion factors: heat, weight, and activity. Interobserver agreement obtained for the heat factor are 0.099, 0.079 for weight, and 0.160 for activity. Comparing the results with other studies involving single colors or two-color combinations shows that the agreement is good, especially for heat and weight. (Solli & Lenz, 2011)