Is the VISUAL PERCEPTUAL PROPERTY
interacting in the eyes with the spectral
sensitivities of the light receptors in different
categories like RED, YELLOW, BLUE, GREEN,
Color categories and physical specifications
of color are also associated with objects,
materials, light sources, etc., based on their
physical properties such as light absorption,
reflection, or emission spectra.
Color derives from the Spectrum of Light
(distribution of light powers versus
Visible Light Spectrum; An
Normally when we use the term "light," we are
referring to a type of electromagnetic wave that
stimulates the retina of our eyes. In this sense, we are
referring to visible light, a small spectrum from the
enormous range of frequencies of electromagnetic
radiation. This visible light region consists of a
spectrum of wavelengths that range from
approximately 700 nanometers (abbreviated nm) to
approximately 400 nm. Expressed in more familiar
units, the range of wavelengths extends from 7 x 10-7
meter to 4 x 10-7 meter. This narrow band of visible
light is affectionately known as ROYGBIV.
Each individual wavelength within the spectrum
of visible light wavelengths is representative of a
particular color. That is, when light of that particular
wavelength strikes the retina of our eye, we perceive
that specific color sensation.
Color Vision in the Eye
Three types of cones (color)
One type of rod (B/W only)
Sir Isaac Newton - DISPERSION
Showed that light shining through
a prism will be separated into its
different wavelengths and will thus
show the various colors that visible light
is comprised of. The separation of
visible light into its different colors is
known as dispersion.
Each color is characteristic of a
distinct wavelength; and different
wavelengths of light waves will bend
varying amounts upon passage
through a prism. For these reasons,
visible light is dispersed upon passage
through a prism. Dispersion of visible
light produces the colors red (R),
orange (O), yellow (Y), green (G), blue
(B), and violet (V). It is because of this
that visible light is sometimes referred to
as ROY G. BIV.
(Incidentally, the indigo is not actually observed
in the spectrum but is traditionally added to the
list so that there is a vowel in Roy's last name.)
The red wavelengths of light are the longer wavelengths and the violet
wavelengths of light are the shorter wavelengths. Between red and violet, there
is a continuous range or spectrum of wavelengths.
Wavelengths & Photons
Particles of light, called photons, each have a wavelength.
Additive Color Wheel
There are R
No Photons Spectral
of These Colors
Colors M Y
Adding Color Lights
red & green photons
looks same as
Notice overlap of red, green, & blue
is seen as WHITE light
Newton’s Color Wheel
Prism spectrum is a
straight line, so why
did Isaac Newton
describe color using a
Before we continue our discussion,
Let me show you some tricks in Color Wheel
The Color Wheel
The color wheel is a
means of organizing
the colors in the
The color wheel
consists of 12
containing one hue.
A hue is a name of
a color on the color
This lesson will discuss
each of the colors,
color harmonies and
how they are created.
The Primary Color Triad
The primary colors
are, red, yellow and
blue and are the
purest and most
intense of all the
The intensity of a color is
the brightness or dullness of red blue
They form a triangle on the
color wheel and are colors
that cannot be mixed from
any other colors. These are
the only colors that can be
found in nature.
The Secondary Color Triad
The secondary colors
are orange, green and
violet and are duller orange green
than the primaries
because they have
been mixed together.
They form a triangle on
the color wheel and
are colors that are
mixed from the primary
Primary + Primary =
Red + yellow=orange violet
Blue + yellow= green
Red + blue= violet
The Intermediate (Tertiary) Colors
These colors are yellow-orange,
yellow-green, blue-green, blue- Yellow
violet, red-orange, red-violet Yellow
and are even duller than the
secondary colors because the
primary has been mixed with a
These 6 colors are formed by
mixing a primary and a
Primary + Secondary = Tertiary
yellow + orange=yellow-orange violet violet
red + orange = red-orange
red + violet =red-violet
blue + violet = blue-violet
blue + green =blue-green
yellow + green = yellow-green
Eye is not a perfect
Color “wheel” is
Rim is full saturation,
center is white
What color is
present in the
Hue, Saturation, Value
Color wheel is
a single wheel
stack of wheels
that range in
The Warm and Cool Color Scheme
Warm colors range from:
Cool colors range from:
A value scale is a scale of
grays running from black to
Spectral Reflectance Curves
When white light shines on a colored object, some photons
absorbed, others reflected by the object’s surface.
Neutral Colors are those colors
not found on the color wheel
but are mixed by other colors
on the color wheel.
Having only one color. Here I used all shades of red to create the design
Uses Colors that are next one another on the Color Wheel
Consists of colors that are opposite of one another on the color wheel.
Consists of a color and the colors to the left and right of its complement
Does the gray bar look slightly bluish?
Are the two gray bars the same shade of gray?
Yes, the presence of a nearby color affects perception of both
hue and value, shifting both towards complement
Offenbar haben Sie einen Ad-Blocker installiert. Wenn Sie SlideShare auf die Whitelist für Ihren Werbeblocker setzen, helfen Sie unserer Gemeinschaft von Inhaltserstellern.
Sie hassen Werbung?
Wir haben unsere Datenschutzbestimmungen aktualisiert.
Wir haben unsere Datenschutzbestimmungen aktualisiert, um den neuen globalen Regeln zum Thema Datenschutzbestimmungen gerecht zu werden und dir einen Einblick in die begrenzten Möglichkeiten zu geben, wie wir deine Daten nutzen.
Die Einzelheiten findest du unten. Indem du sie akzeptierst, erklärst du dich mit den aktualisierten Datenschutzbestimmungen einverstanden.