Evolution of human colour vision that are found between 450 and 625. Individuals with various forms of colour blindness such as deuteranopia and protanopia are missing human middle wavelength sensitive or long wavelength sensitive opsins. Their minimum wavelength differences are <5 but only at around 500. Protanopes, who are missing long wavelength sensitive cones, are unable to distinguish between colours in the green-yellow-red section of the electromagnetic spectrum. They find yellow, red and orange colours to have much lower brightness when compared to a trichromat. The dimming of these colours can result in confusion in many cases, such as when attempting to identify red traffic
Orange (colour) from the photosynthetic pigments called carotenes. Orange is a very common colour of fruits, vegetables, spices, and other foods in many different cultures. As a result, orange is the colour most often associated in western culture with taste and aroma. Orange foods include peaches, apricots, mangoes, carrots, shrimp, salmon roe, and many other foods. Orange colour is provided by spices such as paprika, saffron and curry powder. In the United States, with Halloween on 31 October, and in North America with Thanksgiving in October (Canada) and November (US) orange is associated with the harvest colour, and also is the colour