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Duotone Image Generator - Brand Color Filter Tool

Give your photos a branded color treatment without Photoshop. This duotone generator maps dark tones to one color and light tones to another, creating striking two-color images perfect for social media, hero sections, or marketing materials. Use your brand colors to make photos feel cohesive across campaigns. Free, browser-based, your images never leave your device. It is ideal for designers and marketers who want polished assets without opening heavyweight software. Tweak settings, preview changes instantly, then export and download in a clean format. Everything runs in your browser, so your files stay on your device. Built for speed, clarity, and repeat use. Method details for Duotone Generator: The generator uses deterministic layout, grid, and typography rules, tracks contrast and palette decisions, and preserves gradient/pixel/vector fidelity in the output.

🎨 Drag & Drop Image Here

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(JPG, PNG, WebP)

How to Create Duotone Images

  1. Upload your image - Works with JPG, PNG, WebP
  2. Pick shadow color - The color for dark tones (usually darker brand color)
  3. Pick highlight color - The color for light tones (usually lighter brand color)
  4. Download result - Export as high-quality PNG or JPG

The Science of Duotone

Duotone mimics Photoshop gradient maps without the complexity. The tool converts your image to grayscale, then remaps luminosity values to a color gradient: dark pixels → shadow color, light pixels → highlight color. This technique creates visual consistency across varied photo sources.

Why brands love duotone: Spotify popularized this aesthetic with their bold green/black duotones. It makes generic stock photos feel cohesive with brand identity. It's also attention-grabbing on social media where most images are full-color.

Pro tip: Use high-contrast photos for best results. Portraits with dramatic lighting work exceptionally well. For shadow color, use your primary brand color at 100% saturation. For highlight, use a complementary or analogous color. Avoid similar values - the more contrast between shadow/highlight colors, the more impact.