The complexion of the Brahmanas was white; that of the Kshatriyas was red; that of the Vaishyas yellow; and that of the Shudras was black.
ब्राह्मणानां सितो वण: क्षत्रियाणां तु लोहितः। वैश्यानां पीतको वर्णः शूद्राणामसितस्तथा॥