CC Adi 3.38

idānīṁ dvāpare tiṅho hailā kṛṣṇa-varṇa
ei saba śāstrāgama-purāṇera marma

idānīm—now; dvāpare—in the Dvāpara-yuga; tiṅho—He; hailā—was; kṛṣṇa-varṇa—blackish color; ei—these; saba—all; śāstra-āgama—and Vedic literatures; purāṇera—of the Purāṇas; marma—the core.

Now, in the Dvāpara-yuga, the Lord had descended in a blackish hue. This is the essence of the statements in the Purāṇas and other Vedic literatures with reference to the context.