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
Political colour use their respective traditional colours. In India, saffron is traditionally associated with Hinduism, Hindutva and the Hindu nationalist movement. Saffron was chosen because in Hindu Sanatana Dharma, the deep saffron colour is associated with sacrifice, religious abstinence, quest for light and salvation. Saffron or "Bhagwa" is the most sacred colour for the Hindus and is often worn by Sanyasis who have left their home in search of the ultimate truth. White is today mainly linked to pacifism (as in the surrender flag) and in politics of the United Kingdom to independent politicians such as Martin Bell. Yellow is the colour