In Dvāpara-yuga the Supreme Personality of Godhead appears with a dark blue complexion, wearing yellow garments. The Lord’s transcendental body is marked in this incarnation with Śrīvatsa and other distinctive ornaments, and He manifests His personal weapons.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
द्वापरे भगवाञ्श्यामः पीतवासा निजायुधः । श्रीवत्सादिभिरङ्कैश्च लक्षणैरुपलक्षितः
dvāpare bhagavāñśyāmaḥ pītavāsā nijāyudhaḥ | śrīvatsādibhiraṅkaiśca lakṣaṇairupalakṣitaḥ
SB 11.5.27