TRANSLATION

" 'In the Dvapara-yuga the Personality of Godhead appears in a blackish hue. He is dressed in yellow, He holds His own weapons, and He is decorated with the Kaustubha jewel and marks of Srivatsa. That is how His symptoms are described.'

This is a quotation from Srimad-Bhagavatam (11.5.27). The syama color is not exactly blackish. Srila Bhaktisiddhanta Sarasvati Thakura compares it to the color of the atasi flower. It is not that Lord Krsna Himself appears in a blackish color in all the Dvapara-yugas. In other Dvapara-yugas, previous to Lord Krsna's appearance, the Supreme Lord appeared in a greenish body by His own personal expansion. This is mentioned in the Visnu Purana, Hari-vamsa and Mahabharata.