Majority of Malayalees use cooking gas in their kitchen. An additional gas cylinder is always kept as a precaution in every house. The colour of the domestic gas cylinder you buy is always red. Have you ever wondered why a gas cylinder is red in colour? Don't stress about it. The answer is very simple.

Red colour can be recognized quickly from a distance. Gas cylinders can cause great danger. Red is used as a danger signal also. That is why the cylinders are mostly red in colour. Blue-coloured cylinders are also available. The same logic applies to them. The blue colour is very easily noticed. The colour of the gas cylinder is different depending on the gas inside. A cylinder filled with helium will be brown. A cylinder of carbon dioxide is grey. This is how the colour of the cylinder is determined.