Got it. What about mars? It is red because of Iron Oxide.
My favorite planet is Mars because it's red. Iron oxide is what gives it red tint.
I'm not really a fan of the color red. Really? Have you ever seen the pale red pink or dark red burgundy shades? I have and I think pink is a really cool color, but regular red just doesn't do it for me. Maybe it is just too warm.
Iron oxide also gives the red color to the planet Mars.