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.
Worthy, wise and virtuous: Who is energetic and not indolent, in misfortune unshaken,
flawless in manner and intelligent, such one will honor gain. - Digha Nikaya III 273