color introduction

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INTRODUCTION TO COLOR THEORY JosĂŠ Luis CAIVANO caivano@fadu.uba.ar

University of Buenos Aires and National Council for Research Argentine Color Group











electromagnetic spectrum

380 nm

visible spectrum

780 nm




primary sources objetcs that emit light

secondary sources objects that reflect or transmit light coming from a primary source



psychical part of the process

physical part of the process


Color as a psychophysical phenomenon



Newton Optics, 1704: . . . if at any time I speak of Light and Rays as coloured . . . I would be understood to speak not philosophically and properly, but grossly, and accordingly to such Conceptions as vulgar People . . . would be apt to frame. For the Rays to speak properly are not coloured.



human vision

dog vision













16 cells

16 triple cells






cyan

magenta

yellow






yellow amarillo

red

green white

magenta

magenta cyan red

blue

blue black

yellow

additive mixture

green

cyan

subtractive mixture



blanco white

azul blue

amarillo yellow

redrojo

cian cyan

verde green

magenta magenta

negro black


back of the eye

front of the eye

light cone rod



white


red


green


blue


yellow


magenta


cyan


D50 illuminant


TL84 illuminant


A illuminant


UV radiation





simultaneous contrast


simultaneous contrast






simultaneous contrast


simultaneous contrast







France


chromatic adaptation


chromatic adaptation






normal vision


protanopia


deuteranopia


tritanopia


Metamerism due to a change in the illuminant


Metamerism due to a change in the observer



Association Internationale de la Couleur International Color Association Internationale Vereinigung f端r die Farbe

www.aic-color.org


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