Mauve

Back in 1859, the chemist William Henry Perkin, then only eighteen years old, was attempting to create artificial quinine. An unexpected coloured residue which caught his eye and turned out to be the first synthetic aniline dye, known variously as anilene purple, Tyrian purple, Perkin's mauve or, most usually, as  mauveine. 
Perkin was highly successful in marketing his discovery to the dye industry and it was widely used for dyeing fabrics and for the 6 pence Victorian stamp.

The extra shows the full moon betwixt heaven and earth; by far the brightest thing that I saw on thus miserably dark day.