This study explored the characteristics of interior color for a restorative environment that can provide emotionalsupport in indoor public spaces of educational facilities used daily by ordinary people, by expanding the existing restorativeenvironmental design concept. To this end, an online survey was conducted on the interior colors of a virtual university indoorcommon space targeting 200 male and female university students and graduates. As a research tool, ten 3D spatial images ofa virtual university indoor common space having 10 color combinations with different saturation, brightness, and tone levels ofwarm and cool colors that represent atmospheres, which extracted from the Kobayashi Color Image Scale (CIS) were used forinvestigation. The spatial atmosphere, spatial emotion, and resting space preference for spatial images of each interior colorwere measured. The survey results showed that the spatial image of each color combination and the spatial atmosphereperceived by the respondents were generally consistent, and different spatial emotions were exhibited according to the colorsaturation, brightness, and tone. In particular, it was found that in a subdued tone environment with low saturation and highbrightness, respondents felt comfortable corresponding to feelings of recovery and rest. As a result of the preference survey, itwas found that the most preferred interior color entailed a subdued-tone with low saturation and high brightness for both warmand cool colors for resting spaces. In conclusion, a subdued-tone color with low saturation and high brightness makes peoplefeel comfortable. We therefore suggest this as an interior color for indoor public spaces in educational facilities that supportemotional recovery.