This paper aims to display the geographical distribution and to study the geographical differentiation of the color adjectives. The dialectal forms of the color adjectives are classified into four types; norah-〈typeⅠ〉, nolha-〈typeⅡ〉, noranha-〈typeⅢ〉, and noraŋha-〈typeⅣ〉. And the distribution of them is as follows; typeⅠ: elsewhere, typeⅡ: Pyeongan and Jeolla, typeⅢ: south Chungnam and north Jeonbuk, and typeⅣ: Jeju. TypeⅠ?Ⅱ are differentiated from typeⅢ?Ⅳ by their commom preforms. As it were, the common preforms of typeⅠ?Ⅱ and typeⅢ?Ⅳ are, respectively, ‘Xa/?h?-’ and ‘Xaŋ/?ŋh?-’. TypeⅡ is sub-differentiated from typeⅠby means of analogical restructuring of stems. And typeⅢ is sub-differentiated from typeⅣ by means of ‘ŋ>n’ change.