Chapter 6: Color Flashcards
Daylight (White Light) is _____ of the colors
ALL
White is perceived when all colors in the spectrum are _____
reflected
Black is perceived when all colors in the spectrum are _____
Absorbed
color is not a ______ property of things we see
Physical
The color of an object or surface is determined by?
its reflected or transmitted light
These are all colors of which spectrum?
Green, Blue, Red
Yellow, Magenta, Cyan
Light Spectrum
These are all colors of which spectrum?
Red, Yellow, Blue
Orange, Violet, Gree
Pigment Spectrum
Spectrum is comprised of ______ ______ of color
Different Wavelengths
What is the longest wavelength?
Red
No Light = ___ ____
No Color
What is the shortest wavelenght?
Violet
How do we remember the spectrum colors?
as ROY G BIV
If all colors are absorbed but red is reflected. What color are we seeing?
Red
If blue gets reflected what color will we see?
Blue
What Physiological factors affect color perception?
Brain, Eyes, Age of the individual
When a color appears different altered based on a surrounding color this is?
Simultaneous Contrast
Subjected perceptions of color can be affected by?
Psychology, cultural meanings, and life experiences
Does light have color?
No
Do objects have color?
No
Where does color reside in a person?
The eye/brain system
Color is dependent on?
the light source and reflectance properties of objects
“Color vision” (colored light not pigment) is refered to as?
Hues
____ ____ tells us that tomatoes are red, grass is green, etc.
Color Constancy
all light and pigment colors can be grouped into ___ or ____
Warm or Cool
As most of the lightwaves in cool light will be absorbed by the warm pigment the warm pigment will appear?
Dull
Warm light ____ warm colors and ____ cool colors
Enhances; Neutralizes
Cool light ___ Cool colors and ___ warm colors
Enhances; Neutralizes
All light sources impact the perception of color this is quanitified via 2 methods. What are they?
1.Chromaticity or color temperature
(aka CCT: Correlated Color Temperature)
2. Color-rendering index (CRI)
Color has a _____
Temperature
CCT measures with what unit of measurement?
Kelvin
60,000K will produce what color of light?
Brilliant Blue
2,800K will produce what color of light?
Warm Yellowish White
800K will produce what color of light?
Heated Bar of Steel (Red Glow)
This range of Kelvin is for what type of lamp?
2,600K-3,100K
Incandescent Lamps
This range of Kelvin is for what type of lamp?
2,700K-7,500K
Flourescent Lamps
CRI stands for?
Color-rendering index
CRI measures?
how well a light source makes objects appear
What is the index range of CRI?
0 to 100
The higher the CRI number the ___ the color rendering ability of the lamp
Better
The higher the number in CCT the ____ the color
Cooler
A CRI of __ should be considered as minimum for most retail applications
80
Colors light in value have ___ reflectance properties which and reflect ___ light
Higher; More
Reflectance properties are designated in?
Percentages
Two samples match under one light source, but not under a different light source can be defined as?
Metamerism
Profile of color characteristics of lamps correlated with radiant power can be defined as?
Spectral-power distribution curves (SPD)`
SPD stands for?
Spectral-power distribution curves
The output of a light source can be characterized by its relative power at each wavelength can be defined as?
Spectral Power
When information is graphed (power vs. wavelength) we call it?
Spectral Power Distribution (SPD)
