What color is the mantle in real life?

I'm just a bit curious, could you please elaborate on something that's been bugging me? It's about the mantle, specifically, its color in real life. You know, I've seen it described in so many different ways in books and movies, but I've never actually seen one in person. Is it a deep, velvety red? Or perhaps a rich, earthy brown? Or could it be something completely different? I'm just really fascinated by this and would love to hear your thoughts on it. After all, you're the expert in this field, and I trust your judgment implicitly. So, what say you? What color do you think the mantle truly is in real life?