Sweta-Varaha as the name refers White-Boar. But the Varaha avatar of Lord Vishnu which lifted the earth from waters was of dark-blue complexion. Varaha avatar which killed Hiranyaksha was also dark blue.
Here are some statements from scriptures:
Harivamsa Parva of Mahabharata:
“Having a colour, similar to that of a dark blue rain cloud, with a sound similar to the thunder of a rain cloud, with a body similar to that of a huge mountain, with his fang shining like the white island”. [Harivamsa Parva 3.34.31]
“The mighty boar, whose eyes were like the lotus, and whose body, vast as the Níla mountain, was of the dark colour of the lotus leaves, uplifted upon his ample tusks the earth from the lowest regions”. [Vishnu Purana 1.04.26]
Srimad Bhagvata Purana:
Then the Lord, playing like an elephant, suspended the earth on the edge of His curved white tusks. He assumed a bluish complexion like that of a tamala tree, and thus the sages, headed by Brahma, could understand Him to be the Supreme Personality of Godhead and offered respectful obeisances unto the Lord. [Srimad Bhagavatam 3.13.33]
Varaha which killed Hiranyakshya was also of dark blue colour as stated here:
“The slayer of asuras, sparkled with the conch and chakra (wheel) like a dark blue rain bearing cloud sparkles between the sun and the moon”. [Harivamsa Parva 3.39.14]
Then why is the Present Kalpa named Sweta-Varaha Kalpa? Why was it named so? It denotes which event ?
[Note: the name kalpa before 5 Kalpas from present Kalpa was Varaha Kalpa]