North india
India can demographically and geographically be divided into 2 main regions (not including the Lakshadweep and the Andaman and Nicobar Islands): North and South.
North India consists of Gujarat, Madhya Pradesh,Jharkhand, West Bengal, and all states geogaphically above them.
South India consists of all the states below the line between Gujarat and West Bengal. The South Indian states are Chattisgarh, Maharashtra, Orissa, Karnataka, Andhra Pradesh, Goa, Kerala, and Tamil-Nadu. These are states known to have more Dravidian influence, as their languages also differ linguistically from Sanskrit. Languages with Aryan influence are related to Sanskrit.
The states to the east of Bangladesh are in a region known as North-East India. The states in Northeast India are Assam, Meghalaya, Tripura, Mizroam, Manipur, Nagaland, and Arunachal Pradesh. Sometimes, Sikkim is also categorized into this region.
North India, in a broad sense, is the region with heavy Aryan influence. However, among Indians, traditionally, "Northern India" means something different. To them, Northern India consists of Gujarat, Rajasthan, Uttar Pradesh, Haryana, Punjab, Uttaranchal, Himachal Pradesh, and Kashmir. These are states with very strong Aryan influence, and generally, they possess lighter skin than those of their counterparts.
Although the "dark skin-light skin" analogy can be applied to the North India (broad sense) and South India, it isn't as widespread among the population as it is in those states. Dravidian states usually have people with darker skin. People in the states of Eastern Kashmir, Sikkim, Arunachal Pradesh, and other Northeastern Indians states tend to look more "oriental" than Indian; and oriental (in a stereotypical sense) as "skinny eyes".