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
Colour sergeant Colour sergeant Colour sergeant (CSgt or C/Sgt) is a rank of non-commissioned officer found in several militaries. Colour sergeant is a rank in the Foot Guards regiments of the Canadian Forces, specifically the Governor General's Foot Guards and the Canadian Grenadier Guards. It is the equivalent to warrant officer; a colour sergeant wears the rank insignia of a warrant officer (a royal crown) on all uniforms except No. 1 Ceremonial Dress, on which a special rank badge is worn: three chevrons, point down, surmounted by an image of regimental colours. Canadian colour sergeants are addressed in the same manner as