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Zia Tile has a catalog of 64 colors, and Case Study includes four new offerings — ruddy Pompeii; cool beige Dune; burnt orange Rust; and Elemental Blue, an Yves Klein-inspired cobalt shade.

Orange rust coated the floor, crept over pipes and trailed from crevices in the walls, according to cell phone photos taken four months before the explosion.

While the other containers were brightly colored and marked with company logos, this one was black with big patches of orange rust.

Dashes of orange rust formed a stripe, like a lane line on a freeway.

Plants that are orange, rust, brown or bronze warm my heart and liven up gray days.