The present study was designed and undertaken to define color attributes of lightness or brilliance (Rd%) and chroma or degree of yel-lowness (+b) of the Egyptian cotton varieties. The objective is to deter‌mine the variation and the confidence limits within which the intrinsic in‌herent color attributes of each of the Egyptian cotton varieties would vary . As such , color attributes could be regarded as reliable criteria uti‌lized to characterize and to identify cotton varieties. The materials used in the present study comprised 12 Egyptian cotton varieties, grown in 1997 season , which are classified according to the local practice in Egypt as either Extra-Long staple or Long staple. Those varieties were grown at different locations in Delta (North) and Upper Egypt (South). The samples representing the cotton varieties in‌volved in the study were found to have lint grades ranging between Good -1/4 and Good + 1/4. In virtue of the color attribute of degree of yellowness (+b) , the commercial Egyptian cotton varieties were classified into 2 color catego‌ries i.e. White and Creamy., each including 3 color classes,i.e. Extra-white, Light White and White in the White color category and Light Creamy, Creamy and Dark Creamy in the Creamy color category. Fur‌ther. the confidence limits for the values of color attributes of lightness and yellowness of the Egyptian cotton varieties, were determined. Those confidence limits could be used to define the identity of a cotton sample with a specified confidence of 95% in accordance with the coincidence or divergence of the values of color attributes of the concerned sample relative to the values of the confidence limits of a given variety.