Rose madder

Rose madder is the commercial name sometimes used to designate a paint made from the pigment madder lake, a traditional lake pigment extracted from the common madder plant Rubia tinctorum.

Madder lake contains two organic red dyes: alizarin and purpurin. As a paint, it has been described as "a fugitive, transparent, nonstaining, mid valued, moderately dull violet red pigment in tints and medum solutions, darkening to an impermanent, dull magenta red in masstone."