The experiments were carried out to confirm how the evaluation on an exterior color of building was influenced from the colors of the foreground buildings. Main results are as follows. 1. Comparison acts on the evaluation of attractiveness, and assimilation acts on the evaluation of harmony and the necessity of the restriction oppositely. 2. As for conspicuous building, it is not easy to harmonize with the surroundings and the necessity of the restriction is also high. 3. The building stands out well, is not harmonized easily by the color difference with the foreground buildings large, and the necessity of the restriction rises further.
