FLUX.2 Klein 9B – Manga Colorization LoRA by reference

📝 Short description

A LoRA for FLUX.2 Klein 9B Base that colorizes manga pages using a color reference image.
Feed the first image — a black-and-white manga panel — and the second image — a reference with character colors. The model paints the page while keeping character palettes, hair, eyes, outfits, and overall style consistent.
Supports multiple characters in one reference image.

Trigger word: mngclranm

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📊 Examples

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📖 Extended description

This LoRA is built for manga and comic colorization. You provide a lineart or grayscale page and a color reference showing how characters should look — hair color, skin tone, clothing, accessories, and overall palette. The model fills in the page while preserving line art structure and character identity from the reference.

The color reference can include several characters at once (e.g. a colored splash page or character sheet). The LoRA maps those palettes onto matching figures in the target panel.

Part of the RefControl family: reference-guided image editing for consistent, controllable generation on FLUX.2 Klein 9B Base.

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⚙️ How to use

1. Use the first image as the manga page to colorize (lineart / B&W panel).
2. Use the second image as the color reference (colored characters, palette guide).
3. Add the trigger word mngclranm in your prompt.
4. Optionally add a short text description (lighting, mood, background tint) to refine the result.
5. Adjust LoRA weight (recommended 0.8–1.0) depending on how strongly you want to follow the reference colors.

Base model

Use with black-forest-labs/FLUX.2-klein-base-9B.
The undistilled Base variant is intended for LoRA training and custom pipelines (~50 inference steps, guidance_scale ~4.0).

✅ Example prompt

mngclranm

With optional description:

mngclranm, warm sunset lighting, soft shadows

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🎯 What it does

• Colorizes black-and-white manga panels while keeping clean line art.
• Transfers character colors from a reference image (hair, eyes, skin, clothes).
• Supports multiple characters when the reference shows more than one.
• Accepts extra prompt text to steer lighting, atmosphere, or small details.

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⚡ Tips

• Best results when the reference clearly shows the characters that appear on the target page.
• A colored cover, splash page, or character sheet works well as a multi-character reference.
• Add a few words in the prompt for lighting or background color if the flat reference is not enough.
• LoRA weight 1.0 gives the strongest color transfer; lower slightly if colors look oversaturated.

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📌 Use cases

• Coloring new manga chapters from an existing colored reference.
• Keeping consistent palettes across a series or doujin.
• Batch colorization of lineart pages with one shared character reference.
• Quick preview coloring before manual finishing in Photoshop / Clip Studio.

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📦 Files

• Weights: manga_colorization.safetensors
• ComfyUI workflow: Flux2_klein_9b_manga_colorization.json
• Repo: thedeoxen/FLUX.2-klein-9B-manga-colorization-by-reference-LORA