color introduction

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