coloring-page

What This Skill Does

The coloring-page skill is a creative utility for OpenClaw that transforms standard photographs into high-quality, printable black-and-white line art. By leveraging the advanced Nano Banana Pro (Gemini 3 Pro Image) model, the skill intelligently identifies edges, contours, and significant features within an uploaded raster image to create a clean, simplified outline suitable for coloring. The output is a high-contrast PNG file with a white background, perfect for print-at-home activities or digital coloring projects. This skill automates the labor-intensive process of manual image tracing, making it accessible to anyone with an OpenClaw session.

Installation

To integrate the coloring-page skill into your OpenClaw environment, ensure you have the uv package manager installed on your system. Navigate to your terminal and execute the following command:

clawhub install openclaw/skills/skills/borahm/coloring-page

Additionally, you must configure your environment variables to allow the skill to communicate with the model provider. Ensure your ~/.clawdbot/.env file contains a valid GEMINI_API_KEY. Once these prerequisites are met, the skill will be automatically registered and ready for invocation via the OpenClaw interface.

Use Cases

This skill is ideal for parents looking to create custom coloring books from family photos, educators creating personalized worksheets for students, and artists looking to quickly generate line art references from reference photos. It bridges the gap between digital photography and traditional art, offering a fun and engaging way to repurpose personal visual media.

Example Prompts

• "Can you turn this picture of my dog into a coloring page for me to print out?" (Attach image)
• "I have this photo of a landscape, please convert it into a coloring page with 2K resolution." (Attach image)
• "Create a coloring page from this file." (Attach image)

Tips & Limitations

For the best results, use high-resolution input images with clear subject matter. The skill performs best on photos with distinct lighting and contrast. While it excels at simple, sharp outlines, highly complex or noisy photos may result in cluttered line work. If the output is not sufficiently detailed, experiment with the --resolution flag (options include 1K, 2K, or 4K) to adjust the output fidelity. Note that this tool creates strictly black-and-white images and will remove all color data from the original source file.