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non-spectral hue

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additive primary

Overview page. Subjects: Psychology.

Any of the shades of red, green, or blue that can be mixed to form white and to match all other spectral colours and also certain non-spectral colours such as purple. Primary red, green,...

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colour circle

Overview page. Subjects: Psychology.

A diagram showing the relationship between the hue and saturation (1) dimensions of colours, differences in hue being represented by different positions around the circumference of the...

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colour triangle

Overview page. Subjects: Psychology.

A triangular representation of the relationship between the hue and saturation (1) dimensions of colours, having hues arranged in their natural spectrum order around its perimeter, with...

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extra-spectral colour

Overview page. Subjects: Psychology.

Another name for a non-spectral colour. US extra-spectral color. [From Latin extra outside + spectrum a spectacle, from spectare to watch, from specere to look at + -alis of or relating to]

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hue

Overview page. Subjects: Psychology.

The dimension of a colour that is determined by the wavelength of the light in relation to the wavelengths reflected from objects or surfaces in other parts of the visual field and that...

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primary colour

Overview page. Subjects: Psychology.

Any of a group of colours from which all other colours can be obtained by mixing. The primary colours for pigments are red, blue, and yellow. The primary additive colours for light are red,...

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spectral colour

Overview page. Subjects: Psychology.

Any colour found in the visible spectrum, thus excluding colours such as purple (a mixture of red and blue). US spectral color. Also called a spectral hue. Compare non-spectral colour.

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spectral hue

Overview page. Subjects: Earth Sciences and Geography.

A hue which is present in the spectrum of colours produced by splitting white light with a prism. Spectral hues include red, green, and blue. Compare non-spectral hue.

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void mode

Overview page. Subjects: Psychology.

A manner of viewing a coloured surface through a small aperture so that only a small and isolated area of the surface is visible at one time. Under these conditions the Land effect...

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