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48 lines
1.6 KiB
Markdown
48 lines
1.6 KiB
Markdown
---
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description: Apply a two-color duotone effect with custom shadow and highlight colors.
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---
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# Duotone
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Apply a two-color duotone effect to an image. The image is converted to grayscale, then mapped to a gradient between the shadow color (dark tones) and the highlight color (bright tones).
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## API Endpoint
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`POST /api/v1/tools/image/duotone`
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Accepts multipart form data with an image file and a JSON `settings` field.
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## Parameters
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| Parameter | Type | Required | Default | Description |
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|-----------|------|----------|---------|-------------|
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| shadow | string | No | `"#1e3a8a"` | Shadow hex color (applied to dark tones) |
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| highlight | string | No | `"#fbbf24"` | Highlight hex color (applied to bright tones) |
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| intensity | integer | No | `100` | Effect intensity (0-100); 0 returns the original, 100 applies the full duotone |
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## Example Request
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```bash
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curl -X POST http://localhost:1349/api/v1/tools/image/duotone \
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-H "Authorization: Bearer si_your-api-key" \
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-F "file=@photo.jpg" \
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-F 'settings={"shadow": "#0f172a", "highlight": "#f97316", "intensity": 80}'
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```
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## Example Response
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```json
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{
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"jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
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"downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/photo.jpg",
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"originalSize": 2450000,
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"processedSize": 1870000
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}
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```
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## Notes
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- Output format matches the input format. HEIC, RAW, PSD, and SVG inputs are automatically decoded before processing.
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- An `intensity` of less than 100 blends the duotone result with the original image, allowing for subtler effects.
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- Popular duotone combinations include navy/gold, teal/coral, and purple/pink.
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