Kāṣāya — The Ochre Robe of Renunciation
Kāṣāya (Sanskrit: derived from kaṣāya = astringent, tawny colour) is the distinctive ochre or saffron-coloured robe that marks the sannyāsī — one who has formally renounced household life and worldly attachment for a life of complete dedication to Bhagavān and the welfare of souls.
What the Kāṣāya Signifies: The colour itself carries meaning — tawny ochre is the colour of the earth, of fire, and of the dawn; it signifies: purification through renunciation, the burning away of desires, and the dawning of spiritual clarity. For the Śrī Vaiṣṇava sannyāsa tradition, the kāṣāya accompanied by the tridaṇḍa (triple staff) distinguishes the tridaṇḍī sannyāsī — the form of renunciation adopted by Śrī Rāmānujāchārya and the Āchāryas in his lineage.
Tridaṇḍī Sannyāsa: In the Śrī Vaiṣṇava tradition, sannyāsa is the tridaṇḍī form — three staffs bound together, representing the renunciation of body, speech, and mind (kāya, vācha, manas) in the service of Bhagavān. The kāṣāya and tridaṇḍa together constitute the formal identity of the Śrī Vaiṣṇava monastic Āchārya.
In Anthimopāya Niṣṭhā: Accounts of great Āchāryas — Nampillai, Bhaṭṭar, Nañjīyar — describe them adorned with kāṣāya as they moved among their disciples, their very appearance communicating renunciation, authority, and compassion.