Orange (colour) and absorb mostly greenish-blue light. (See also shades of orange). Other orange pigments include: The orange colour of carrots, pumpkins, sweet potatoes, oranges, and many other fruits and vegetables comes from carotenes, a type of photosynthetic pigment. These pigments convert the light energy that the plants absorb from the sun into chemical energy for the plants' growth. The carotenes themselves take their name from the carrot. Autumn leaves also get their orange colour from carotenes. When the weather turns cold and production of green chlorophyll stops, the orange colour remains. Before the 18th century, carrots from Asia were usually purple,
Colour revolution groups, even borrowing the colour orange from the Ukrainian revolution. In November 2005 protesters took to the streets, waving orange flags and banners, to protest what they considered government fraud in recent parliamentary elections. The Azerbaijani colour revolution finally fizzled out with the police riot on 26 November, during which dozens of protesters were injured and perhaps hundreds teargassed and sprayed with water cannons. On February 5, 2013, protests began in Shahbag and later spread to other parts of Bangladesh following demands for capital punishment for Abdul Quader Mollah, who had been sentenced to life imprisonment, and for others convicted