Yeah, that could very well be a stotram to Lord Shiva. Nilakantha is one of his epithets, from the time he drank the poison from the churning of the ocean of milk; his consort Parvati grabbed his throat so he wouldn't swallow the poison. It stayed there and colored his throat blue. And he is known to be covered in ash. But don't kid yourself, there are a lot of Hindus who have hissy fits when there's any comparison outside of Hinduism to the Hindu deities. Most don't care, though, or know that Tara is one of the Mahavidyas, manifestations of Durga, a form of Parvati.
"Compassion is that which makes the heart of the good move at the pain of others." - The Buddha
"May I be gentle-minded, cultivating the six paramitas, and never forget bodhicitta. May I completely cleanse without omission every negativity and all that obscures this awakening mind." - from Samantabhadracarya Pranidhana