Out of Many, One.
And out of a single Self
the richly variegated people
that are America,
the Visshuddhi Chakra of the World.
Shri Krishna, the ruler of the Visshuddhi Chakra, is described in the Hindu scriptures as "blue-black". In paintings from the 19th and 20th centuries, He is often depicted as light sky-bluish in complexion, but this may be due to the influence of British rule with it's practice of dividing and conquering India, by highlighting differences in skin colour between north and south.
Below are two black images of Shri Krishna: left - ShriNathji (Nathdwara, Rajasthan), right - Shri Vitthala (Pandharpur, Maharashtra). Note the light blue-complexioned infant Krishna superimposed over the original indigo-complexioned, Self-manifested image type of ShriNathji.