Pluto's moon Charon got its red toupée from the dwarf planet
 

NASA's New Horizons spacecraft showed us a part of Charon we'd never seen before: a rusty red section crowning its polar region. It's an intriguing feature, something the mission's ground team hadn't seen before, so they spent the past year studying...

https://www.engadget.com/2016/09/15/...aron-red-pole/