Generate rounded outline icons

Generate one general-purpose icon.
Subject: [subject]
Meaning and use: [meaning]
Dominant color: [color]

Use the attached example icon only as a style reference. Preserve its rounded geometric shapes, deep navy #25324a outlines and compact, friendly silhouette; do not copy the reference subject. Use sparse details readable at 64px. One dominant color and no more than two supporting colors, including one small lime #b7f34a accent. Flat matte colors, no visible gradients, shadows, glow, gloss or 3D.
Square canvas, at least 1024 × 1024, centered subject with 12–18% working space. Opaque pure white #ffffff background for later removal. One connected visual metaphor; no words, letters, numbers, logos, people, loose decorations or additional objects. Deliver a single image, not a grid. Background removal and 512px transparent PNG export are separate steps.