All effects and presets

Effect

Duotone

Map luminance between two colours for bold poster and print grades.

Duotone printing maps a greyscale image through two inks so midtones carry colour while keeping the structure of a mono print. Magazine and poster work used it to get richness without full four-colour cost.

Digitally, two colour stops on luminance give the same bold poster energy. Pick inks with contrast and the form stays readable.

Duotone example
Example

Properties

  • Start Color

    lower color

    Range
    Colour
    Default
    0.825, 0.18, 0.146

  • End Color

    upper color

    Range
    Colour
    Default
    0, 0.212, 0.686

  • (red gamma, green gamma, blue gamma)

    Range
    0.3, 0.3, 0.3 to 3, 3, 3
    Default
    0.836, 0.95, 0.829

Command line

Requires Rethings Pro. Install the tool from Rethings → Install Command Line Tool… 

rethings apply --effect duotone --set start_color=0.825,0.1798,0.1458 --set end_color=0,0.2118,0.6863 -i input.jpg -o output.png

Gallery

  • Duotone example 1
  • Duotone example 2
  • Duotone example 3
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