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Just as the colors of an abstract painting or photograph can produce a certain mood, so can the colors of a building or room profoundly influence how the people using it feel. Physiologically, study after study has shown that blue light slows the production of melatonin, keeping people more alert or awake even at night. Psychologically, people associate certain colors with certain feelings due to cultural symbols and lived experiences – for example, they might perceive the color red as menacing or frightening because of its connection to blood.

Altogether, the way a room is colored can have complex effects on how its users feel, while a façade can be perceived in dramatically different ways depending on how it is colored. Below, we summarize the emotional associations of every color, assessing their differing effects as each is used in architectural space.

According to the UN, more than 7000 extreme weather events have been recorded since 2000. Just this year, wildfires raged across Australia and the west coast of the U.S.; Siberia charted record high temperatures, reaching 100 degrees Fahrenheit before Dallas or Houston; and globally, this September was the world’s hottest September on record. As the effects of the climate crisis manifest in these increasingly dire ways, it is the prerogative of the building industry – currently responsible for 39% of global greenhouse gas emissions – to do its part by committing to genuine and sweeping change in its approach to sustainability.

One of the most challenging aspects of this change will be to meet mounting cooling demands in an eco-friendly way. Cooling is innately more difficult than heating: any form of energy can become heat, and our bodies and machines naturally generate heat even in the absence of active heating systems. Cooling does not benefit equally from spontaneous generation, making it often more difficult, more costly, or less efficient to implement. Global warming and its very tangible heating effects only exacerbate this reality, intensifying an already accelerating demand for artificial cooling systems. As it stands, many of these systems require large amounts of electricity and rely heavily on fossil fuels to function. The buildings sector must find ways to meet mounting demand for cooling that simultaneously elides these unsustainable effects.