It looks to me like I saw some gray on the lower half but could be photo that I looked at.
While her hair looks like she hasnt been to the salon and it’s just her roots growing out...that is probably a sophisticated dye job
since I never have dyed my hair- it’s just a guess
When I started getting gray in my late twenties . . .you know the gray hair sticking straight up on the top of the head , , , I said, “Lord, it looks like I’m getting gray hair, please give me some good ones.” He answered my prayer and others have since agreed. Have a relative diagnosed with cancer and was doing some research and found this 2019 article. https://draxe.com/health/does-hair-dye-cause-cancer/