Here's how it works:
* Methane absorbs red light: Methane gas in Uranus' atmosphere absorbs red light from the Sun.
* Blue and green light are reflected: The remaining light, primarily blue and green, is reflected back into space. This is why Uranus appears blue-green to us.
It's important to note that while methane is the primary reason for Uranus' color, other atmospheric components like hydrogen and helium also play a role.
