We have heard a lot about Hydrogen and different colour associated with Hydrogen, but what is the colour of Hydrogen? Why different colours, and what is the difference in green Hydrogen? With many innovations and recent development, the production of green Hydrogen is getting cheaper every year. We are at a stage that mass production of green Hydrogen is a reality, and it is going to change our economy and manufacturing sector completely. But there are so many other factors and parameters that need to be considered for any hydrogen project.