Why are my flaxseed hulls sometimes dark brown and sometimes a golden brown?

This is because of the type of flaxseed used. Sometimes we are able to obtain golden flaxseed and sometimes we are able to obtain brown flaxseed. They both have the same nutrient content and they both have the same shelf life. They are both high quality flaxseeds grown in North America. Because this is a natural product, the color may vary.