Sour gas when in the world is purple, easy to distinct from other gasses, but when it is in a gas-pipe its different.
All other gasses got a color when looking in the gas-piping overlay, but Sour gas is just white, like the pipes themselves, making it impossible to tell if there's 1000g in a pipe, or if its 50mcg. It should be purple.
Steps to Reproduce
Go to the ventilation overlay Pump Sour-gas into a gas-pipe Done
This issue has not been confirmed by a developer yet.