CMYK vs RGB

CMYK vs RGB

Notes to date 28/02/2012

CMYK (Process Colour, Four Colour)

• C - Cyan
  M - Majenta
  Y - Yellow
  K - Key (Black)
•  Used for print. (300dpi - dots per inch)
•  Ink is typically applied in order of abreviation.
• 'Subtractive' colour model.
• CMYK works by masking colours on a ligher (white) background.
• The ink reduces the light that would otherwise be reflected.
• Hence 'subtractive' as ink's subtract brightness from white.

RGB

• R - Red
  G - Green
  B - Blue
• Used for screen. (72ppi - pixels per inch)
• Also used in photography.
• 'Additive' colour model.
• Colour is created by mixing light emitted by different coloured sources.
• Red, Green and Blue are emitted onto a Black screen.
• Hence 'added' together from these different sources.