The Colors of Hydrogen: Understanding Its Role in a Net-Zero Future

The Hydrogen Rainbow: A Quick Guide

Green Hydrogen

Produced through electrolysis, using 100% renewable energy sources like wind, solar, or hydropower.

Green hydrogen is the gold standard for sustainability, as it emits no carbon emissions.

While currently accounting for less than 1% of global production, it is expected to scale rapidly. The global electrolyzer capacity is projected to reach 5 GW by 2024 (IEA Report).

Grey Hydrogen

Produced from fossil fuels, primarily natural gas, without carbon capture.

Grey hydrogen dominates production today, representing 80% of the market but contributing significantly to CO₂ emissions (IEA Report).

Blue Hydrogen

Produced similarly to grey hydrogen, but with carbon capture and storage (CCS) to reduce emissions.

Seen as a transitional solution, blue hydrogen is cleaner and can bridge the gap while renewable technologies scale up.

Forecasts estimate blue hydrogen production could reach 80 million tonnes annually by 2050, assuming supportive policies (Statista).

Pink Hydrogen

Produced via electrolysis powered by nuclear energy, making it a low-carbon and reliable alternative.

While not widely produced today, pink hydrogen has significant potential, particularly in regions with established nuclear infrastructure.

Want a clear, visual breakdown of the hydrogen rainbow?

Conclusions – Why Do the Colors Matter?

Hydrogen is versatile, powerful, and central to a clean energy future—but not all hydrogen is created equal.

Hydrogen plays a pivotal role in decarbonizing sectors that are difficult to electrify, such as:

• Heavy-duty transportation (trucks, trains, ships, and aviation).
• Energy-intensive industrial processes, like steel and cement production.

However, the transition to cleaner hydrogen comes with challenges:

• Scaling clean production (green and blue hydrogen) at a competitive cost.
• Building the necessary infrastructure for storage, transport, and refueling stations.
• Integrating renewable energy sources to ensure a stable, efficient hydrogen supply.

Global hydrogen production currently stands at 97 million tonnes annually, with blue hydrogen accounting for only 1% of that value. To meet net-zero goals, the share of low-emission hydrogen must grow. Projections show that low-emission hydrogen production could reach 49 million tonnes per year by 2030, driven by advancements in green and blue hydrogen technologies (IEA Report).