In this study, the effect of clothing color preferences of adolescents on their self expression desires and fashion interest were investigated. These investigations were intended to understand some psychological aspects of adolescents and to make a contribution to guiding them in forming self identities and expressing themselves confidently through clothing. This research was based on 452 copies of questionnaires distributed to middle and high school students living in Seoul and other metropolitan areas from the middle of March to the beginning of April, 2008. The results were as follows. First, there was a significant difference in clothing color preference and clothing color tone preference between male students and female students. Second, the factor analysis which has been performed by taking assimilation, individuality, recognition, and image management as composing dimensions of self expression desire shows significant differences between these dimensions. Third, the difference in the self expression desires according to clothing color preference showed that the group preferring cool colors and the group preferring warm colors possessed the same highest self expression desires. And, it was revealed that the clothing color preference was a significant variable influencing fashion interest. Fourth, the effect of self expression desire on the fashion interest degree showed that recognition was the most significant factor and image management was the next.