Uranus appears blue-green or cyan rather than purely green, due to methane gas in its atmosphere that absorbs red wavelengths and reflects blue-green light.
Uranus's Color:
Actual appearance: Blue-green, cyan, or turquoise
Not pure green: More accurately described as blue-green
Cause: Methane ice crystals in upper atmosphere
Why Blue-Green:
Methane absorbs red and orange light
Reflects blue and green wavelengths
Results in cyan/blue-green appearance
Comparison:
Neptune: Deeper blue (also has methane)
Uranus: Lighter, more green-tinged blue
Both are "ice giants" with similar compositions
Importants Points:
Color: Blue-green or cyan (not pure green)
Cause: Methane in atmosphere
Description: Sometimes called "green planet" but more accurately blue-green