What is a duotone effect?

A duotone effect replaces the full tonal range of an image with a gradient between two colors. Dark tones map to one color and highlights map to the other, with midtones blending between them. It originated in print design where only two ink colors were used.

Can I add more than one duotone?

Yes. You can stack unlimited duotone layers. Add as many color combinations as you need, adjust each layer's colors, opacity, and blend mode, then reorder them to control which appear on top.

Why does Spotify use duotones?

Spotify adopted duotone as part of their brand identity to make artist and album imagery immediately recognizable and visually cohesive across their platform. The bold, high-contrast two-color look became associated with their brand starting around 2015.

What blend modes are available?

The tool offers 12 blend modes including Normal, Multiply, Screen, Overlay, Soft Light, Hard Light, Color Dodge, Color Burn, Difference, Exclusion, Lighten, and Darken. Each creates different color interactions between layers.

Does the original image need to be black and white?

No. The tool converts the image to grayscale internally before applying the duotone colors. You can use any color photo as the source.

Are my images uploaded?

No. All processing runs in your browser. Your images never leave your device.

Yes, completely free with no account needed.

Images Tool Box

Editing

Duotone Effect Online Free

Apply multiple duotone effects to any photo with full control. Stack unlimited duotone layers with shadow/highlight colors, opacity, and blend mode controls. Quick presets for Spotify, Instagram, Midnight, Sunset, Ocean, and Forest. Create graphic editorial styles. All processing runs in your browser.