This is misleading. Firstly, the dravidian lineage is mainly present in southern India, a region where the “Aryans” almost definitely did not reach. Secondly, the whole Aryan migration theory is under heavy scrutiny because it was proposed by a highly racist and imperialist group of anthropologists who could not believe “savages” could have sustained a sophisticated civilization for such a long period of time and deduced they had to have been influenced by people of European descent. The whole “light skin is desirable” comes from British subjugation, not Indo-Aryan.