Shiva Purana
गोपेश्वरः समाख्यातः रंगेश्वर इति स्मृतः ॥ वामेश्वरश्च नागेशः काजेशो विमलेश्वरः॥ ८॥
He is described as the lord of the cows and is known as the lord of the colours. Vameshvara Nagashvara Kajeshvara and Vimalashvara.
english translation
gopezvaraH samAkhyAtaH raMgezvara iti smRtaH ॥ vAmezvarazca nAgezaH kAjezo vimalezvaraH॥ 8॥
hk transliteration by Sanscript