ChU 6.4.2
यद् आदित्यस्य रोहितं रूपं तेजसस् तद् रूपम् । यच् छुक्लं तद् अपाम् । यत् कृष्णं तद् अन्नस्य । अपागाद् आदित्याद् आदित्यत्वम् । वाचारम्भणं विकारो नामधेयं त्रीणि रूपाणीत्य् एव सत्यम्
yad ādityasya rohitaṃ rūpaṃ tejasas tad rūpam | yac chuklaṃ tad apām | yat kṛṣṇaṃ tad annasya | apāgād ādityād ādityatvam | vācārambhaṇaṃ vikāro nāmadheyaṃ trīṇi rūpāṇīty eva satyam
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
'The red colour of the sun (âditya) is the colour of fire, the white of water, the black of earth. Thus vanishes what we call the sun, as a mere variety, being a name, arising from speech. What is true are the three colours.
Translated by F. Max Müller