Red Mars may have roads made of yellow brick. If not very yellow, then certainly, orange-yellow.
A team of researchers at Northwestern University has developed a kind of concrete for Mars that doesn’t require water. Instead, it combines Martian soil with liquid sulfur, obtained by heating the element up to 240 Fahrenheit until it melts into a lemon-yellow puddle.
The material would be twice as strong as Earthly concrete. Plus, it’d be highly recyclable. It could be reheated until the sulfur melted, and the entire block became malleable again, so it could be reset into a new form.