By 1930, the book "A Dictionary of Color" identified three major tones of lavender--"[floral] lavender", "lavender gray", and "lavender blue", and in addition a fourth tone of lavender called "old lavender" (a dark lavender gray) (all four of these shades of lavender are shown below). By 1955, the "ISCC-NBS Dictionary of Color Names" listed dozens of different shades of lavender. 