Uma Samhita
The Uma Samhita is a significant section of the Shiva Purana, dedicated primarily to the goddess Uma, another name for Parvati, the consort of Lord Shiva.
Answer in Details
In Lord Shiva’s depictions, his blue face and throat are deeply symbolic and rooted in Hindu mythology. This characteristic is primarily due to the event known as the Samudra Manthan (Churning of the Ocean).
During the churning of the cosmic ocean by the Devas (gods) and Asuras (demons) to obtain Amrita (the nectar of immortality), a deadly poison called Halahala emerged. This poison was so potent that it threatened to destroy all creation. To save the universe, Lord Shiva compassionately drank the poison. However, instead of swallowing it, he held it in his throat, preventing its harm from spreading.
Due to the poison residing in his throat, Shiva’s neck turned blue, earning him the name Neelkanth (the blue-throated one). The blue color symbolizes his self-sacrifice for the welfare of the world, his immense power to contain negativity without being affected, and his role as a protector.
Thus, the blue face and throat in Lord Shiva’s depictions represent this profound act of compassion, self-control, and supreme detachment from the effects of poison, both literal and metaphorical.