Walk through the new civic quarter in Valencia's northern districts and the first thing you notice is not the form of the buildings but their temperature. The library glows the colour of baked clay. The adjoining housing block is finished in a dusty rose render that seems to change with the hour, pale at noon and almost crimson by evening. Even the paving has been tinted with iron oxide. After two decades in which serious contemporary architecture tended to arrive in grey, white or mirrored glass, the effect is disarming.
Valencia is not an isolated case. From Marseille to Oaxaca to the outskirts of Jaipur, a loose movement of practices is rediscovering the palette of the earth: ochres, siennas, umbers and the particular pinkish orange of fired terracotta. Some of them are working with the materials themselves, reviving brick, tile and rammed earth. Others use pigment, render and tinted concrete. What unites them is a conviction that colour is not decoration, applied at the end of a project, but a structural decision with consequences for how a building is lived in.
The shift has technical roots. Earth-toned surfaces absorb and release heat differently from glass, and in hotter cities the thermal argument has become impossible to ignore. Clay and lime renders breathe. Terracotta cladding can be made locally, often from waste material. For architects facing tightening carbon regulations, the old vernacular palette offers something the curtain wall cannot: a way of building that is both lower in embodied energy and legible to the people who live around it.
The politics of warmth
But the conversation is not only about carbon. Ines Marwick-Sato, whose studio Atelier Rojo Tierra designed the Valencia library, argues that the grey-glass decades carried an unspoken message. “Glass says that the building belongs to the global economy, to capital that could be anywhere,” she says. “Earth says that the building belongs to this ground, this light, these people.” Her practice begins every commission by collecting soil samples from the site and matching them to pigments.
That approach has its sceptics. Some critics warn that earthy colour is in danger of becoming a new kind of branding, a warm veneer applied to developments that are no more rooted than the glass towers they replace. There are already speculative residential schemes in several European capitals that borrow the terracotta look while relying on imported cladding panels and conventional concrete frames. The palette, it turns out, is easier to copy than the thinking behind it.
Every city already has a colour. Our job is to listen for it, not to invent one.
The most convincing projects avoid this trap by treating colour as a matter of research rather than taste. In Oaxaca, the cooperative practice Casa Barro spent a year documenting the pigments found in the city's older facades before designing a single building. In Marseille, a new school by Studio Halden Kerr uses bricks fired from clay dredged during a nearby harbour project, their colour varying from pale apricot to deep rust depending on the batch.
What emerges from these buildings is a quieter kind of ambition. They do not photograph as dramatically as the sculptural icons of the early two-thousands, and they rarely win the kind of attention that circulates on social media. But they age well, they sit easily beside older neighbours, and they seem to invite people to linger. On a warm evening in Valencia, the library steps fill with teenagers, as if the building had simply absorbed the heat of the day and was now handing it back.
