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Color mixing: addition & Subtraction. Physics Arrowhead High School 2013 – 2014. Color Addition. Primary Transmission Colors Red, Green & Blue Pixels on a screen Colors produced on a screen depend on the intensity of each colored pixel

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color mixing addition subtraction

Color mixing:addition & Subtraction

Physics

Arrowhead High School

2013 – 2014

color addition
Color Addition
  • Primary Transmission Colors
    • Red, Green & Blue
    • Pixels on a screen
    • Colors produced on a screen depend on the intensity of each colored pixel
    • Colors absorbed by the eye’s cones peak at Red, Green & Blue
color addition color wheel
Color Addition – Color Wheel

Red

Magenta

Yellow

Blue

Green

Cyan

color addition practice
Color Addition - Practice
  • R + 0 = Red
  • R + B = Magenta
  • R + G + B = White
  • B + G = Cyan
  • G + 0 = Green

BLUE

RED

GREEN

1

2

3

4

5

color addition practice1
Color Addition - Practice

RED

  • B + 0 = Blue
  • B + R = Magenta
  • B + R + G = White
  • R + G = Yellow
  • G + 0 = Green

BLUE

GREEN

1

2

3

4

5

color subtraction
Color Subtraction
  • Primary Absorption Colors
    • Magenta, Cyan, Yellow & Black
    • Printer Ink Colors
    • These colors reflect the transmission colors that make them up and absorb the others
    • Intensity controlled by amount of ink used
      • Number of dots printed
      • Size of dots printed
color subtraction cyan visible
Color Subtraction – Cyan Visible
  • Cyan ink is printed on white paper
  • White light (RGB) shines on the paper
  • The cyan ink absorbs red and reflects green and blue
  • The eye sees the color cyan
color subtraction cyan visible1
Color Subtraction – Cyan Visible

Intensity

Intensity

R G B

R G B

color subtraction using the color wheel
Color Subtraction – Using the Color Wheel
  • The absorption color (Cyan, Magenta or Yellow) absorbs the opposite transmission color
  • Black absorbs all transmission colors and darkens the resulting color
color subtraction red visible
Color Subtraction – Red Visible

Intensity

Intensity

R G B

R G B

Magenta absorbs green

Yellow absorbs blue

color subtraction maroon visible
Color Subtraction – Maroon Visible

Intensity

Intensity

R G B

R G B

Magenta absorbs green

Yellow absorbs blue

Black absorbs some red

color subtraction navy blue visible
Color Subtraction – Navy Blue Visible

Intensity

Intensity

R G B

R G B

Magenta absorbs green

Cyan absorbs red

Black absorbs some blue

color subtraction light green visible
Color Subtraction – Light Green Visible

Intensity

Intensity

R G B

R G B

Low intensity cyan

absorbs some red

Low intensity yellow

absorbs some blue