Color theory primary colors work at all is that the imperfect pigments being used have sloped absorption curves, and thus change color with concentration. A pigment that is pure red at high concentrations can behave more like magenta at low concentrations. This allows it to make purples that would otherwise be impossible. Likewise, a blue that is ultramarine at high concentrations appears cyan at low concentrations, allowing it to be used to mix green. Chromium red pigments can appear orange, and then yellow, as the concentration is reduced. It is even possible to mix very low concentrations of the blue mentioned and
Blue Is the Warmest Colour Blue Is the Warmest Colour Blue Is the Warmest Colour (; ), known as Blue Is the Warmest Color in the United States, is a 2013 French romance film co-written, co-produced, and directed by Abdellatif Kechiche, and starring Léa Seydoux and Adèle Exarchopoulos. The film follows Adèle (Exarchopoulos), a French teenager who discovers desire and freedom when an aspiring painter (Seydoux) enters her life. The film charts their relationship from Adele's high school years to her early adult life and career as a school teacher. The premise of "Blue Is the Warmest Colour" is based on the 2010 graphic novel