Orange (colour) Orange (colour) Orange is the colour between yellow and red on the spectrum of visible light. Human eyes perceive orange when observing light with a dominant wavelength between roughly 585 and 620 nanometres. In painting and traditional colour theory, it is a secondary colour of pigments, created by mixing yellow and red. It is named after the fruit of the same name. 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
Academic dress of the University of Nottingham partially or fully lined with light blue silk which is the University colour and trimmed with a ribbon the colour of which indicates the graduate's faculty. All members of the University (from undergraduate to Doctor to Divinity) wear a black square cap except for doctors in full dress for whom the regulations now specify a round black velvet bonnet. Lately, such persons have been observed wearing a cord around the brim of the bonnet though these are not stipulated in the regulations. These cords are claret or scarlet for those with substantive doctorates (depending on the colour of the dress