The researchers speculate that the dyes used to color the books contain other lead-based pigments that lack chromium, such as lead(II) oxide or lead(II) sulfide. The team is working to identify ...

Before the chemical-color inventions of the mid-19th century ... the preferred method for producing pink fabric dye required the extraction of matter from dried kermes insects—but only those ...

Imani Perry’s new book, Black in Blues: How a Color Tells the Story of My People, begins with a memory of blue: A missing ...