हरे राम कृष्ण
Dear K. Lakshman, Namaskar.
Heres answering your query on the topic of Varṇada Lagna.
Varṇa means color, caste or the single syllable of a word or mantra. As a sound syllable it refers to the origin of our creation, namely sound itself of which the first sound was aum. Sound manifests in the Akaśa or ether element, followed by the creation of the Vāyu or air element, which again is followed by the Agni or fire element. At this stage light and therefore also color emanated. This then resulted in the creation of Jala or water which gave sustenance and finally Prthvi or earth which brought about the solid surfaces and therefore also food.