Is it against a Mormons religion to open chakras?

No, members of the Church of Jesus Christ of Latter-day Saints (the "Mormon" church) may participate in Eastern, holistic, new age and metaphysical health and wellness practices, including opening chakras, if they wish. Most Mormons do not believe in such things, but I have known some Mormons who are quite involved in meditation, healing crystals, and other forms of spiritual healing. The Church itself has no doctrine or official statements for or against these practices of which I am aware.