The name Krishna means the dark one which pull to all-attract towards spiritual.
Krishna means Shyam, the dark & not exactly black. It is said that Lord Krishna was born at dark night on astami, there fore he had been named "Krishna".
Krishna is termed as Svayam Bhagavan since he was the purna-avatara or full incarnation of the supreme god

Krushna/krishna mean One in the transport of joy....

Krishna represents the total power of attraction (Aakarshna Shakti) like a magnet of infinite rise. Hence Krishna is the source of joy.

Krushna Janmashtami Gokulashtami

-from online web resource