yellow, if you add oxygen it will turn blue.
Blue flames can be an indicator of temperature, because blue flames burn hotter than yellow flames, or it could be a chemical that burns blue. Something else that could create blue flames in a gas fireplace is if the air-to-gas mixture ratio is off, more air means bluer flames.
it is a yellow green gas
argon is blue in discharge tube
Flatulent gas
because of a gas called methane that is the same gas that makes neptune blue
When people fart , methane gas is produced.Another thing about methane gas is that cows are one biggest producers of methane gas because they have two stomachs.You know they burp more methane than farting it. Termites are at the top of the list ! They fart more methane than anything ! There are many other animals and things that produce methane gas .
The blueish color of Uranus is from the presence of Methane in its upper atmosphere. Also, it is blue - green from the methane in the core of Uranus.
Chlorine is a yellow-green gas at room temperature.
venus
methane gas
Uranus
Methane.
Methane Gas
Your question describes the planet Neptune.
The surface of Neptune in blue-green in color because of methane gas. The planet Neptune has 13 moons and six rings.
Neptune.