CMYK for print - a subtractive colour mode, ink on paper
RGB for screen - additive colour mode, light of monitor
All colour modes can only display a limited gamut. RGB has a wider gamut than CMYK (not all colours on screen can be reproduced in printed ink).
How can we work with colour consistently for both screen and print?
Gamut warning
Colour appears duller in CMYK colour mode
RGB is photoshop’s default mode
Colours outside CMYK colour mode are bright vivid and highly saturated
Or select proof colours
Using swatches keeps colour choices consistent throughout a document
CMYK - four process inks are used to create colour
Spot - one spot ink is used to create colour
PMS (Pantone matching system)
Reasons for spot colour:
- accurate reproduction of colour
- it can be cheaper, fewer inks makes production less expensive.
- spot inks are used to print colour that it is not reproducible using CMYK
Pantone Reference System
- Each swatch indicates base colour mixture
- 14 base inks & transparent white
- Some swatches are reproducible in CMYK
Using spot colour:
- Open swatch menu select menu bar top left of swatch panel
- Click open swatch library
- Select colour books
- Select Pantone option
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