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How Do We Mix Color ?. How do determine complimentary color ?. How Do We Mix Colored Light?. There are two types of color mixing: 1. The mixing of lights (additive). 2. The mixing of pigments (subtractive). What are Additive Primary Colors ?. Red, Green and Blue - PowerPoint PPT Presentation
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How Do We Mix Color?How do determine complimentary color?
How Do We Mix Colored Light?• There are two types of color mixing:
1. The mixing of lights (additive). 2. The mixing of pigments (subtractive).
What are Additive Primary Colors?• Red, Green and Blue• Notice white in the center
Additive Primary Color Arithmetic
• Red + Green = Yellow • Green + Blue = Cyan• Red + Blue = Magenta
How Does Your Old TV Work?• Three electron beams strike three different
phosphors• At a distance you don’t notice the individual
colored dots
How Does Your Laptop Screen Work?• Each dot is a device or pixel is made up of 3
cells (Blue, Red and Green)• Light behind screen passes through the cell
or pixel to combine into one color
Laptop Screen Continued• The brightness of the three colors determines
the final color of the pixel• Instead of phosphors, the laptop uses a
Liquid Crystal Display (LCD)
How Do We Describe the Color White?• Primary additive + Secondary additive =
White; Considered Complimentary Colors• Blue + Yellow = White• Blue comes from 1/3 of the spectrum and
Yellow contains light from the other 2/3 of the spectrum (Red + Green)
Complimentary Color Arithmetic
• Secondary + Primary = White• Yellow + Blue = White• Magenta + Green = White• Cyan + Red = White
How Do We Determine Complimentary Colors from White Light?
• White – Primary = Secondary• White – Blue = Yellow• White – Red = Cyan• White – Green = Magenta
PRIMARY & SECONDARY ADDITIVE COLORS SMARTBOARD EXERCISE
Your Turn…
How Do We View Colored Objects in Colored Light?
Red
lightShirt looks red
Shorts look black
Blue
light
Shirt looks black
Shorts look blue
Object Color of light Color object seems to be
Red socksRed RedBlue BlackGreen Black
Blue teddyRed BlackBlueGreen
Green camelRedBlueGreen
Magenta book
RedBlueGreen
What are Subtractive Complimentary Colors
• Blocks and their shadows appear as different colors depending on the color of light that illuminates them.
What are Subtractive Complimentary Colors
• If white light falls on a pigment that absorbs red light, the light reflected appears cyan.
• Subtract a color from white light and you have the complementary color.
What are Subtractive Complimentary Colors
• White light passes through all three transparencies, the light of all frequencies is subtracted and black is produced
• Adding Cyan, Magenta and Yellow together will produce Black
COLOR MIXING WORKSHEETYour Turn…
Why Does Mixing Blue and Yellow Paint Give Us Green?
Color with Magazines and Newspaper • A printing press prints each
page with four different inks or pigments, CMYK (Cyan-Magenta-Yellow-Black)
• Each color is transferred to paper with a different plate
• The plate transfers tiny dots of color to the paper
• The overlapping dots plus black produce many colors
CMYK Printing
Homework
• Read pp. 554-558 • Answer Ques. 1, 2, 4, 26 .