What is the status of a Muslim woman who participated in the Hindu festival of Holi when they splash coloured 'holy' water on all and sundry?

Answer

Participation in any non-Muslim religious festival is kufr. Holi is a festival of shirk and kufr. Any Muslim who participates in it becomes a murtad. The following episode should be salubrious for those who desire to participate in non-Muslim religious festivals.

In India there was an Aalim who was walking in the street on Holi day when Hindus splash coloured water and perhaps coloured cow urine on every person who crosses their path. This Aalim passed by a donkey and in an idle moment, he mocked: "Everyone is happy and splashing coloured water on everyone, but no one is splashing anything on you. Come, I shall splash coloured water on you." So saying, he spat on the donkey his saliva which was red as a result of chewing paan (beetle leaf). After this Aalim died, a Buzrug saw him in Jahannam in a dream. When the Buzrug in surprise enquired, the Aalim narrated the episode of the donkey on the day of holi. Allah Ta'ala punished him for even this act of emulating the kuffaar despite there being no intention of imitating the kuffaar.

Those who participate in the festivals of the mushrikeen should take lesson. It is haraam to even jocularly imitate practices of kufr, and to participate therein. The Qur'aan prohibits the slightest inclination towards the ways, styles and customs of the kuffaar and mushrikeen.