The ways in which Perry is using history, stories, collected memories and experiences to show how this colour Blue is linked so intrisincally to the Black existence and culture was compelling and eye-opening. From the specific historical and cultural importance and use of Indigo dye to the myths surrounding Black individuals with 'blue gums' and 'blue tongues'. 

She also traces blue's significance in root work, pottery, clothing colour, and how it was reclaimed in Haiti's revolution, the Civil War, music, emotional expression, as well as in activist movements from America to Africa, and the Caribbean. But not only is she tracing Blue from trade through to slavery and to artistic declarations, she also looks at the small things like use in painting, literature, and the beautiful things in nature like plants and insects. 

I didn't mind the non-linear progression but do think that if the chapters had been organized and compiled into sections by subject that the flow would have made it an easier read.