Graphic designLesson 2 of 2 in the course Colour in design

RGB Color in Digital Imaging: Mixing, Encoding, and Color Management

5 flashcards · 5 quiz questions · 5 match pairs · 5 fill-in sentences · English

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Summary

This lesson introduces RGB as a way to create color by combining light. Understanding the additive model helps explain how electronic displays produce images and why mixing light behaves differently from mixing paint.

RGB stands for red, green, and blue, the three primary colors of light used in this model. A color is formed by superimposing three light components. Each component can range from fully off to fully on.

All flashcards

Additive color mixing
Combining emitted light from different components to create a perceived color.
RGB secondary colors
Red plus green produces yellow; green plus blue produces cyan; blue plus red produces magenta.
RGB gamut
The set of colors a particular RGB system can reproduce.
Device-dependent RGB
RGB values that can look different because devices reproduce colors differently.
Color management
Using color spaces, profiles, and conversions to control color across devices.

Quiz questions

  1. What do the letters RGB stand for in the additive color model?Answer: Red, green, and blue.
  2. How does a display pixel commonly produce a perceived color?Answer: The eye blends light from nearby red, green, and blue subpixels.
  3. What does the gamut of an RGB system describe?Answer: The colors reproducible using that system's defined primaries.
  4. In an indexed-color image, what does a pixel's stored index identify?Answer: An RGB entry in a color lookup table.
  5. Why might identical RGB numbers look different on two displays?Answer: The displays can have different primaries and component responses.

Based on the Wikipedia article RGB color model, licensed CC BY-SA 4.0. Adapted into a summary, flashcards and quizzes.

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