1. Intro to Color Theory

2. Objectives Identify and discuss various color models including RGB, CMYK, Black/white and spot color. Investigate color mixing processes. Apply color mixing processes to create new colors in digital format using various software tools.

3. Typical Color Models H-S-B (or V) R-G-B C-M-Y-K (Black) Black & White Spot Color

4. Visible Light Spectrum

5. Color Attributes A Theoretical Approach Characteristics of Color –Hue –Brightness –Saturation

6. Hue - Perceived as “Color”

7. Brightness - Amount of Perceived “White” in a Hue

8. Saturation - Amount of Perceived “Black” in a Hue

9. Hue Circle

10. Brightness or “Gray” Scale White Black 256 Levels Of Brightness Zero Units 255 Units

11. Hue and Brightness

12. Additive Color Mixing and the R-G-B Color Model

13. Additive Color Mixing Used for mixing colors created by light. –Video Cameras –Computer Screens –Television Lights –Video Monitors

14. Additive Color Mixing Three primary colors: –Red –Green –Blue This is the R-G-B color model.

15. Additive Color Mixing Assuming a “pure” hue. Equal amounts of red and blue yields magenta.

16. Additive Color Mixing Assuming a “pure” hue. Equal amounts of red and green yields yellow.

17. Additive Color Mixing Assuming a “pure” hue Equal amounts of blue and green yields cyan.

18. Additive Color Mixing Assuming a “pure” hue. When all three overlap, they “add up” to white!

19. Brightness or “Gray” Scale White Black 256 Levels Of Brightness Zero Units 255 Units

20. How Many Colors? Zero Units of Red = Black 255 Units of Red = Pure Red Color has 256 levels from 0 to 255. 256 Possible Reds!

21. How Many Colors? The R-G-B Model can mix. Any of 256 shades of red. Any of 256 shades of green. Any of 256 shades of blue. Yielding a possible 16,777,216 colors!

22. Digital “Math” 2 1 = Black & White 2 9 = 5122 17 = 131072 2 2 = 4 colors2 10 = 10242 18 = 262144 2 3 = 8 colors2 11 = 20482 19 = 524288 2 4 = 16 colors2 12 = 40962 20 = 1048576 2 5 = 32 colors2 13 = 81922 21 = 2097152 2 6 = 64 colors2 14 = 163842 22 = 41194304 2 7 = 128 colors2 15 = 327682 23 = 8388608 2 8 = 256 colors2 16 = 655362 24 =16777216

23. Digital “Math” 2 1 = Black & White 2 9 = 5122 17 = 131072 2 2 = 4 colors2 10 = 10242 18 = 262144 2 3 = 8 colors2 11 = 20482 19 = 524288 2 4 = 16 colors2 12 = 40962 20 = 1048576 2 5 = 32 colors2 13 = 81922 21 = 2097152 2 6 = 64 colors2 14 = 163842 22 = 41194304 2 7 = 128 colors2 15 = 327682 23 = 8388608 2 8 = 256 colors2 16 = 655362 24 =16777216

24. Digital “Math” 2 1 = Black & White 2 9 = 5122 17 = 131072 2 2 = 4 colors2 10 = 10242 18 = 262144 2 3 = 8 colors2 11 = 20482 19 = 524288 2 4 = 16 colors2 12 = 40962 20 = 1048576 2 5 = 32 colors2 13 = 81922 21 = 2097152 2 6 = 64 colors2 14 = 163842 22 = 41194304 2 7 = 128 colors2 15 = 327682 23 = 8388608 2 8 = 256 colors2 16 = 655362 24 =16777216

25. Digital “Math” 2 1 = Black & White 2 9 = 5122 17 = 131072 2 2 = 4 colors2 10 = 10242 18 = 262144 2 3 = 8 colors2 11 = 20482 19 = 524288 2 4 = 16 colors2 12 = 40962 20 = 1048576 2 5 = 32 colors2 13 = 81922 21 = 2097152 2 6 = 64 colors2 14 = 163842 22 = 41194304 2 7 = 128 colors2 15 = 327682 23 = 8388608 2 8 = 256 colors2 16 = 655362 24 =16777216

26. Digital “Math” 2 1 = Black & White 2 9 = 5122 17 = 131072 2 2 = 4 colors2 10 = 10242 18 = 262144 2 3 = 8 colors2 11 = 20482 19 = 524288 2 4 = 16 colors2 12 = 40962 20 = 1048576 2 5 = 32 colors2 13 = 81922 21 = 2097152 2 6 = 64 colors2 14 = 163842 22 = 41194304 2 7 = 128 colors2 15 = 327682 23 = 8388608 2 8 = 256 colors2 16 = 655362 24 =16777216

27. Digital “Math” 2 1 = Black & White 2 9 = 5122 17 = 131072 2 2 = 4 colors2 10 = 10242 18 = 262144 2 3 = 8 colors2 11 = 20482 19 = 524288 2 4 = 16 colors2 12 = 40962 20 = 1048576 2 5 = 32 colors2 13 = 81922 21 = 2097152 2 6 = 64 colors2 14 = 163842 22 = 41194304 2 7 = 128 colors2 15 = 327682 23 = 8388608 2 8 = 256 colors2 16 = 655362 24 =16777216

28. Saturation and Brightness Saturation = 255 units Brightness = 128 units

29. Saturation and Brightness Saturation = 0 units Brightness = 128 units

30. Subtractive Color Mixing and the C-Y-M-K Color Model

31. Subtractive Color Mixing Used for mixing inks for printing. Primary colors are: –Yellow –Cyan –Magenta

32. Subtractive Color Mixing Assuming a “pure” hue. Equal amounts of cyan and magenta yields blue.

33. Subtractive Color Mixing Assuming a “pure” hue. Equal amounts of magenta and yellow yields red.

34. Subtractive Color Mixing Assuming a “pure” hue. Equal amounts of cyan and yellow yields green.

35. Subtractive Color Mixing Assuming a “pure” hue. When inks are mixed, the color filters or “subtracts” out yielding black.

36. Subtractive Color Mixing When mixing inks or pigments, you never achieve a true black. Black requires a special black mixture.

37. Spot Color Use of one color for printing purposes. –Business cards –Clip art –Logos

38. Spot Color Usually a single color is added to black as in this example. Different values of the same hue can be used.

39. Changing Colors in Graphics Software

40. Changing Colors Click on foreground Color to launch “Color Picker”.

41. Changing Colors

45. Curriculum Content and Activities created by Dr. Mark Mortensen Dept. of Technology & Cognition University of North Texas Copyright C. Mark Mortensen 2001