यदु रोहितमिवाभूदिति तेजसस्तद्रूपमिति तद्विदांचक्रुर्यदु शुक्लमिवाभूदित्यपांरूपमिति तद्विदांचक्रुर्यदु कृष्णमिवाभूदित्यन्नस्य रूपमिति तद्विदांचक्रुः ॥ ६.४.६ ॥
In plain words
Whatever seemed red they knew to be the form of heat; whatever seemed white they knew to be the form of the waters; whatever seemed black they knew to be the form of food;