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Open beta

Duotone

Map the whole tonal range of an image onto two colours, shadows to one and highlights to the other.

COLOUR family · free, no signup

← All the FX

Family
COLOUR
Availability
Free — no signup
Controls with options
1

Two colours, one image

Every tone in the picture is replaced by a point between your two colours, dark areas taking the shadow colour and bright areas the highlight colour. The result is a single-ink print look, the kind a two-colour screen print gives.

How the colours blend

The blend between the two colours can be done in RGB, which is the direct mix, or in OKLCH, which keeps the midpoints perceptually even. Use OKLCH when the two colours are far apart and the middle tones would otherwise turn muddy.

Every option, from the app

Generated from the registry the app publishes, so this list is whatever the current build actually ships — not a copy of it.

Interpolation
RGBOKLCH
  • Gradient MapRemap tone through an editable multi-stop gradient baked to a LUT, in RGB or OKLCH — the difference between recolouring an image and tinting it.
  • Split ToneTint the shadows one way and the highlights another, while keeping the image's brightness structure.
  • RisographSpot-ink riso printing: luminance separated into two or three inks, each screened at its own angle with mottled grain and multiplied over tinted paper — mis-registration and all.

It’s in the app — open it and it’s there, no signup. Open V3KTR · all the FX · how it works