What has colour been created with? And which meanings has it assumed through the time and for the many different artistic movements? Questions which may spontaneously arise in many people while observing a painting; questions, however, which do not easily find an answer in the traditional texts of the history of art; promted by the same curiosity, the author has tried to share with all those who have asked themselves the same questions, the results of her studies and her passionate researches, through easy reading, that is suitable for anyone who wants to know more about both the material and the spiritual aspect of colour in painting art.