Hi hoping someone can give me some direction.  I have dark brown hair with lots of gray.  I have been dyeing my hair for years with commercial products and am concerned about relation to cancer.  I would love to use a natural henna instead of chemicals.  I LOVE the color burgundy.  Would someone kindly assist me to figure out which henna would cover a lot of gray and possibly give me the burgundy color I love. 

Darlene