Herbivore products are made only with 100% natural ingredients, so t's normal for them to vary in color. In the case of the Blue Tansy Mask, this can be a deep blue/gray to a mossy green. This variance is just due to the color of the Blue Tansy Oil we receive which ranges in color depending on the crop. We try to source the most blue of this oil, but depending on availability we are sometimes only able to choose one that is green.
This color variance does not indicate that the product is any less effective than one that is blue, and it is still perfectly safe to use within its 12-month shelf-life.