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ISO 24505:2016 pdf free

ISO 24505:2016 pdf free.Ergonomics一Accessible design一Method for creating colour combinations taking account of age-related changes in human colour vision
Colour appearance changes with the viewing mode such as the self-luminous mode or the reflective or object mode. This International Standard is based on the Munsell colour system, the colour appearance of which is the object mode. For colours of the self-luminous mode or light sources, such as electronic displays, this International Standard can be applicable when appropriate conversion of colour appearance is assured.
NOTE 1 Transformation of colour coordinates of Munsell colour system to CIE XYZ system has not been formulated yet. There are, however, some conversion methods or data for practical use which can be applied to the self-luminous mode colours (see Annex C).
NOTE 2 Some requirements for using colours in electronic visual displays are described in more detail in References [1] and [5].
NOTE 3 The light source of illumination is a factor affecting the appearance of object-mode colours. This International Standard is based on data taken under a daylight fluorescent lamp. When using other light sources,such as incandescent lamps or LEDs, it is noted that the colour appearance is shifted (see Reference [2]).
Colour appearance also changes with visual field size and surrounding colours. This International Standard is based on the field size larger than 20 min of arc of visual angle (2,9 mm from the 50 cm distance) below which colour appearance changes. Care shall be taken to ensure that the visual angle is above 20 min of arc.
This International Standard is based on dark surround where no strong contrast effect occurs. For coloured or lighter surround, the colour appearance also changes more or less with the surround, and care shall be taken not to cause strong change of the appearance.
Thirteen colours are defined as fundamental colours in this International Standard which are perceived as the most basic in human colour perception for people with normal colour vision. They are red, yellow-red (orange), yellow, green-yellow, green, blue-green, blue, purple-blue, purple, red-purple, white, grey,and black.
Each fundamental colour has a span in a colour space that consists of colours similar in appearance to each reference colour of the fundamentals. Two spans are definable with different extent of similarity:Span 1 consists of colours that are highly similar to the reference, Span 2 are colours that are somewhat or less similar to the reference.ISO 24505 pdf free.

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