Petalica Paint is an AI-driven web application designed to automatically colorize sketches. It allows users to upload their rough sketches and apply color hints to guide the colorization process. The tool features three unique colorization styles: 'Tanpopo', 'Satsuki', and 'Canna', each offering different artistic effects. Integrated within Pixiv Sketch, it also includes a SketchSimplification feature that helps refine the strokes of the sketches, making them cleaner and more visually appealing.

This application is suitable for artists, including medical illustrators and game artists, who can utilize its capabilities for both personal and commercial projects. While Petalica Paint is not a standalone application, its functionalities are enhanced through its integration with Pixiv Sketch. Users must agree to the Terms of Service and Privacy Policy before accessing the tool, ensuring a clear understanding of usage regulations.