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RGB color model
Skills: none
IT concepts: combining red, green and blue light to generate colors
This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License.
Where does this topic fit?
• Internet concepts– Applications– Technology– Implications
• Internet skills– Application development– Content creation (images)
red + blue + green → white
Combine three colors for each pixel
Intensities of each color can range from 0 - 255
Color Red Green Blue
Red 255 0 0
Green 0 255 0
Blue 0 0 255
Yellow 255 255 0
Cyan 0 255 255
Magenta 255 0 255
White 255 255 255
Black 0 0 0
A few examples
Use decimal or hexadecimal
ColorDecimal(Red, Green, Blue)
Hexadecimal(#RRGGBB)
Black (0, 0, 0) #000000
White (255, 255, 255) #FFFFFF
Red (255, 0, 0) #FF0000
Green (0, 255, 0) #00FF00
Blue (0, 0, 255) #0000FF
Yellow (255, 255, 0) #FFFF00
Cyan (0, 255, 255) #00FFFF
Magenta (255, 0, 255) #FF00FF
A few examples
MillenniumPark,Chicago
A large RGB display
Coffee cuppixels
Zoom and pan for detail
A very large image
297,500 x 87,500 pixels (26 gigapixels)
A few questions
How many different colors are possible using the RGB model?
What colors are the background and text on a page with this body tag:
<body bgcolor = "#ffffff" text = "#000000" >
What happens if you change the values of the bgcolor and text attributes?
RGB color model
Skills: none
IT concepts: combining red, green and blue light to generate colors
This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License.
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