By 1930 , the book A Dictionary of Color identified three major shades of lavender -- ( floral ) lavender , lavender gray , and lavender blue , and in addition a fourth shade of lavender called old lavender ( a dark lavender gray ) ( all four of these shades of lavender are shown below ) . By 1930 , the book A Dictionary of Color identified three major shades of lavenderâ '' ( floral ) lavender , lavender gray , and lavender blue , and in addition a fourth shade of lavender called old lavender ( a dark lavender gray ) ( all four of these shades of lavender are shown below ) .