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New York-based designer and inventor Joe Doucet has introduced a groundbreaking climate-responsive paint that passively cools and heats buildings by changing color with the seasons. Inspired by mood rings and nature’s ability to regulate temperature through color change, the thermochromic paint appears clear above 77°F (25°C) and turns black in cooler temperatures, helping buildings absorb heat in the winter and reflect it in the summer.

Doucet’s experiments and scientific reviews suggest that this technology could lead to energy savings of 15% to 25%, depending on insulation quality. He has filed a patent for the formulation and partnered with a pilot company to scale testing. While Doucet emphasizes that the paint isn’t a “silver bullet” for climate change, he sees it as a valuable contribution toward sustainable building solutions. The customizable paint could eventually become available for commercial and residential use, providing an innovative way to enhance energy efficiency without altering a building’s aesthetic.