I noticed in the sol 69 pan-cam images there were shots of spirit's heat shield sitting on the rim of Bonneville. The pictures were taken through filters 4, 5, and 6. I combined them to get a "color" image and noticed that the heat shield looked unmistakably blue, just like all the "blue" rocks everyone has been talking about. So here is my question, does anyone know what color the heat shield actually is?
Would this actually help in calibrating the color in other pictures?