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colour contrast


      n     (Psychol)   the change in the appearance of a colour surrounded by another colour; for example, grey looks bluish if surrounded by yellow  
Dictionnaire anglais Collins English definition-Thesaurus  
colour   ,   (U.S.)   color  
a    an attribute of things that results from the light they reflect, transmit, or emit in so far as this light causes a visual sensation that depends on its wavelengths  
b    the aspect of visual perception by which an observer recognizes this attribute  
c    the quality of the light producing this aspect of visual perception  
d    (as modifier)  
colour vision     
2      (Also called)    chromatic colour  
a    a colour, such as red or green, that possesses hue, as opposed to achromatic colours such as white or black  
b    (as modifier)  
a colour television, a colour film         Compare       black-and-white       2  
3    a substance, such as a dye, pigment, or paint, that imparts colour to something  
a    the skin complexion of a person, esp. as determined by his race  
b    (as modifier)  
colour prejudice, colour problem     
5    the use of all the hues in painting as distinct from composition, form, and light and shade  
6    the quantity and quality of ink used in a printing process  
7    the distinctive tone of a musical sound; timbre  
8    vividness, authenticity, or individuality  
period colour     
9    semblance or pretext (esp. in the phrases take on a different colour, under colour of)  
10      (U.S.)   a precious mineral particle, esp. gold, found in auriferous gravel  
11      (Physics)   one of three characteristics of quarks, designated red, blue, or green, but having only a remote formal relationship with the physical sensation  
12    to give or apply colour to (something)  
13    tr   to give a convincing or plausible appearance to (something, esp. to that which is spoken or recounted)  
to colour an alibi     
14    tr   to influence or distort (something, esp. a report or opinion)  
anger coloured her judgment     
15    intr; often foll by: up   to become red in the face, esp. when embarrassed or annoyed  
16    intr   (esp. of ripening fruit) to change hue,   (See also)        colours  
     (C13: from Old French colour from Latin color tint, hue)  

achromatic colour  
      n     (Physics)   colour, such as white, black, and grey, that is devoid of hue  
   See       colour       2  
chromatic colour  
      n     (Physics)      a formal term for       colour       2  
colour bar  
      n   discrimination against people of a different race, esp. as practised by Whites against Blacks  
1    of or relating to any defect in the normal ability to distinguish certain colours  
   See       deuteranopia       protanopia       tritanopia  
2    not discriminating on grounds of skin colour or ethnic origin  
  colour blindness      n  
colour code  
      n   a system of easily distinguishable colours, as for the identification of electrical wires or resistors  
colour contrast  
      n     (Psychol)   the change in the appearance of a colour surrounded by another colour; for example, grey looks bluish if surrounded by yellow  
colour filter  
      n     (Photog)   a thin layer of coloured gelatine, glass, etc., that transmits light of certain colours or wavelengths but considerably reduces the transmission of others  
colour guard  
      n   a military guard in a parade, ceremony, etc., that carries and escorts the flag or regimental colours  
colour index  
1      (Astronomy)   the difference between the photographic magnitude and the visual magnitude of a star, indicating its colour and temperature  
2      (Geology)   the sum of the dark or coloured minerals of a rock, expressed as a percentage of the total minerals  
3      (Chem, physics)   a systematic arrangement of colours according to their hue, saturation, and brightness  
colour line  
      n   the social separation of racial groups within a community (esp. in the phrase to cross the colour line)  
colour phase  
1    a seasonal change in the coloration of some animals  
2    an abnormal variation in the coloration shown by a group of animals within a species  
      n   modifier     (Photog)   (of film or photographic paper) designed to produce a positive image directly from a positive subject  
colour scheme  
      n   a planned combination or juxtaposition of colours, as in interior decorating  
colour separation  
      n     (Printing)   the division of a coloured original into cyan, magenta, yellow, and black so that plates may be made for print reproduction. Separation may be achieved by electronic scanning or by photographic techniques using filters to isolate each colour  
colour separation overlay  
      n      another term for       chromakey  
colour sergeant  
      n   a sergeant who carries the regimental, battalion, or national colours, as in a colour guard  
colour subcarrier  
      n   a component of a colour television signal on which is modulated the colour or chrominance information  
colour supplement  
      n     (Brit)   an illustrated magazine accompanying a newspaper, esp. a Sunday newspaper  
colour temperature  
      n     (Physics)   the temperature of a black-body radiator at which it would emit radiation of the same chromaticity as the light under consideration  
complementary colour  
      n   one of any pair of colours, such as yellow and blue, that give white or grey when mixed in the correct proportions  
composite colour signal  
      n   a colour television signal in which luminance and two chrominance components are encoded into a single signal  
cross colour  
      n   distortion in a colour television receiver in which high-frequency luminance detail is interpreted as colour information and reproduced as flashes of spurious colour  
false colour  
      n   colour used in a computer or photographic display to help in interpreting the image, as in the use of red to show high temperatures and blue to show low temperatures in an infrared image converter  
film colour  
      n     (Physiol)   a misty appearance produced when no lines or edges are present in the visual field  
      n   modifier   (of a print or photographic process) using the principle in which four colours (magenta, cyan, yellow, and black) are used in combination to produce almost any other colour  
local colour  
      n   the characteristic features or atmosphere of a place or time  
off colour  
      adj   off-colour when prenominal  
1      (Chiefly Brit)   slightly ill; unwell  
2    indecent or indelicate; risqué  
primary colour  
1      (Also called)    additive primary   any of three spectral colours (usually red, green, and blue) that can be mixed to match any other colour, including white light but excluding black  
2      (Also called)    subtractive primary   any one of the spectral colours cyan, magenta, or yellow that can be subtracted from white light to match any other colour. An equal mixture of the three produces a black pigment  
3      (Also called)    psychological primary   any one of the colours red, yellow, green, or blue. All other colours look like a mixture of two or more of these colours and they play a unique role in the processing of colour by the visual system,   (See also)        secondary colour       complementary colour  
process colour  
      n     (Printing)   any of the four colours (cyan, magenta, yellow, and black) used in process printing  
r-colour   , r-colouring  
      n     (Phonetics)   an (r) quality imparted to certain vowels, usually by retroflexion  
  r-coloured      adj  
secondary colour  
      n   a colour formed by mixing two primary colours,   (Sometimes shortened to)    secondary  
startle colour  
      n     (Zoology)   a bright region of an animal's coloration, normally hidden from view and often part of a design resembling birds' eyes, etc., exposed when the animal is disturbed by a predator  
tertiary colour  
      n   a colour formed by mixing two secondary colours  
      adj   of, relating to, or comprising a colour print or a photomechanical process in which a picture is reproduced by superimposing three prints from half-tone plates in inks corresponding to the three primary colours  
tone colour  
      n   the quality of a musical sound that is conditioned or distinguished by the upper partials or overtones present in it,   (Often shortened to)    tone      See also       timbre       2  

Dictionnaire anglais Collins English definition-Thesaurus  




1    colorant, coloration, complexion, dye, hue, paint, pigment, pigmentation, shade, tincture, tinge, tint  
2    animation, bloom, blush, brilliance, flush, glow, liveliness, rosiness, ruddiness, vividness  
3      (figurative)   appearance, disguise, excuse, façade, false show, guise, plea, pretence, pretext, semblance  
4    colourwash, dye, paint, stain, tinge, tint  
5      (figurative)   disguise, distort, embroider, exaggerate, falsify, garble, gloss over, misrepresent, pervert, prejudice, slant, taint  
6    blush, burn, crimson, flush, go as red as a beetroot, go crimson, redden  

off colour     
green about the gills, ill, not up to par, off form, out of sorts, peaky, peely-wally     (Scot.)   poorly     (informal)   queasy, run down, sick, under par, under the weather     (informal)   unwell, washed out  

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Dictionnaire Collaboratif     Anglais Définition
bright colours
often used in fashion joournalism
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