Purple and pink skies occur due to a combination of atmospheric conditions and light scattering phenomena. These unusual colors typically appear during:
- Twilight (purple light)
- Certain weather conditions
- Presence of specific particles in the atmosphere
The purple hour occurs when red sunset light combines with the regular blue scattered light in the atmosphere. Pink skies often appear when there’s just the right amount of water vapor or dust particles in the air to scatter red and orange wavelengths while allowing some blue light through. This effect is enhanced when sunlight reflects off the bottom of clouds, creating a pink glow that can spread across the entire sky.