SLIDE 1
Color Perception
The perception of color is very subjective.
Visible color Gamut RGB color Gamut Pantone color Gamut CMYK color Gamut
COLOR (or colour) Color Perception Visible color Gamut RGB - - PowerPoint PPT Presentation
COLOR (or colour) Color Perception Visible color Gamut RGB - - PowerPoint PPT Presentation
COLOR (or colour) Color Perception Visible color Gamut RGB color Gamut Pantone color Gamut CMYK color Gamut The perception of color is very subjective. Color Perception RGB fmow Digital printing small numbers standard sizes
SLIDE 2
SLIDE 3
Color Perception
Who uses what?
Other sources Digital printing
- small numbers
- standard sizes
- “photo” colors
- merges
Ofgset printing
- large numbers
- various formats
- all colors, including
PMS, fmuo and metallic
CMYK fmow RGB fmow
SLIDE 4
Color RGB
Additive: start from black screen, add light in red, green, blue. From black to white, adding light.
Display devices:
- computer screen
- TV
- digital camera
- scanner
SLIDE 5
Color CMYK
Subtractive: start from white sheet of paper, remove light (fjlter) with cyan, magenta, yellow and black inks. From white to black, taking light away.
Printing presses:
- ofgset presses
SLIDE 6
Color RGB vs. CMYK RGB CMYK
SLIDE 7
Color CMY
An early example of 3 color process: CMY (1902)
SLIDE 8
Color C
SLIDE 9
Color C+M
SLIDE 10
Color C+M+Y
SLIDE 11
Color CMYK
SLIDE 12
Color 4 color printing
SLIDE 13
Color Pantone Matching System
SLIDE 14
Color UH red PMS186 CMYK
C=0 1 ink in this case, black as well in this case, no black in the red multiple inks M=100 M=81 K=4
SLIDE 15
Color CMYK vs. Spot Spot CMYK
Advantages Printing multiple colors, especially realistic photos Use of 4 standard inks Afgordable if more than 3 colors Disadvantages More diffjcult to adjust (registration) Limited gamut Approximate reproduction of PMS colors Risk of color variations due to adjustments Advantages Printing vivid colors with precise references (impossible on 4c process or laser printers) Color consistency between jobs and printers Afgordable if limited number of colors (3 or less) Possibility of printing metalic and fmuorescent colors Disadvantages Impossible to reproduce on laser printers Cannot print color photos Need to stock each specifjc color > cost
SLIDE 16
Color Work adjustments InDesign
InDesign Depending on your print method, adjust your colors:
- digital
RGB
- ofgset
CMYK Failure to supply a fjle with the correct colors exposes your job to occasional “interesting” color conversions in the computer-to-plate system. You can load your color swatches from the UH Branding website, ASE fjle (PMS colors or 4c equivalents) CMYK colors spot colors RGB color
SLIDE 17
Color Work adjustments Photoshop
Photoshop preferences Adjust the colorspace to Adobe RGB (1998), in the Edit menu, Color settings Photo adjustments Depending on your print method, convert your photos
- digital
RGB
- ofgset
CMYK File saving Save your photo in .ps format (photoshop) (keeps layers and adjustments and is compatible with InDesign)
SLIDE 18
Color Work adjustments Illustrator
Illustrator adjustments Depending on your print method, convert your colors
- digital
RGB
- ofgset
CMYK These colors will be imported into InDesign. File saving Save your illustrations in .ai format (adobe illustrator) You can load your color swatches from the UH Branding website, ASE fjle (PMS colors or 4c equivalents)