This document appears to be a lesson plan on color and web design presented by Roberto Dadda. It covers color theory developed by Newton and Goethe, the physics of light and how it interacts with different mediums. It discusses additive and subtractive color mixing, primary colors, color wheels, color models and color spaces. The document also covers historical color systems like Pantone as well as color reproduction in digital displays and file formats like raster graphics (TIFF, PNG, GIF) and vector graphics.

1. Mater of Arts in Communication Design
WEB DESIGN
Color

2. "Color." Merriam-Webster.com. Merriam-Webster, n.d. Web.
8 Feb. 2014. <http://www.merriamwebster.com/dictionary/color>.
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3. Color theory
Isaac Newton (Woolsthorpe-by-Colsterworth,
25 dicembre 1642 – Londra, 20 marzo 1727)
Johann Wolfgang von Goethe
(28 August 1749 Frankfurt a. M.-22 März 1832 in Weimar)
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4. Major chemistry investment…
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5. White and monochrome light
In optics, a prism is a
transparent optical
element with flat, polished
surfaces that refract light.
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7. Speed of light…
Medium
Speed Km/s
299,792
Glass
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300,000
Air
Hendrik Lorentz (right) with Albert Einstein.
Vacuum
200,000
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8. Spectrum
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9. Light sources spectrums
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10. Color temperature
Wikipedia
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11. Colored objects
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12. Color mixing
• When we mix colors we see a new color!
• ADDITIVE is mixing lights
• SUBTRACTIVE is mixing color pigments
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13. Aditive primary colors: red, green, blue
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14. Subtractive primary colors: red, yellow,
blue
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16. Colors wheel
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17. 1708
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1908
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19. Pantone, Carlstadt NJ 1962
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21. • Complementary
colors are pairs of
colors which, when
combined in the right
proportions, produce
white or black.
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22. Describin
g a color
• Hue
• Saturation
• Lightness
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27. B&W monitor
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28. Color display RGB
1 pixel = 3 fosfori R,G,B,
illuminati con intensità
variabile
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31. 256 Color Display (8 bit)
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33. 24 bit true color
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35. Old solved problem
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36. Image file format: raster aka bitmap
• In computer graphics, a
raster graphics image, or
bitmap, is a dot matrix data
structure representing a
generally rectangular grid of
pixels, or points of color,
viewable via a monitor,
paper, or other display
medium. Raster images are
stored in image files with
varying formats
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37. TIFF
• TIFF is good for any type of bitmap (pixel-based)
images.
• TIFF produces large files, but there is no loss in
quality. TIFF also preserves layers, alpha
transparency, and other special features when saved
from Photoshop.
• The type of extra information stored with TIFF files
varies in different Photoshop versions, so consult
Photoshop's help for more information.
http://graphicssoft.about.com/od/graphicformats/f/summary.htm
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38. PNG
• Use PNG when you need smaller file sizes with
no loss in quality.
• PNG files are usually smaller than TIFFs, in my
experience.
• PNG also supports alpha transparency (soft
edges) and was developed to be a Web
graphics replacement for GIF.
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39. GIF
• Use GIF for simple Web graphics having limited
colors.
• GIF files are always reduced to 256 unique colors
or less and they make very small, fast-loading
graphics for the Web.
• GIF is great for Web buttons, charts or diagrams,
cartoon-like drawing, banners, and text
headings.
• GIF is also used for small, compact Web
animations. GIF should rarely be used for photos.
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40. Image file format: vector
• Vector graphics is the use of
geometrical primitives such
as points, lines, curves, and
shapes or polygon(s), which
are all based on
mathematical expressions,
to represent images in
computer graphics.
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41. Roberto Dadda
www.dadda.it
roberto@dadda.it
+39 338 775 22 03
Twitter, facebook, linkedin: robertodadda
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