Blue Four-Panel Door with Red Knob - Illustration for Home Design & Safety Guides #87177 (License: Personal Use)

This vector-style illustration depicts a standard interior door in a soft light blue hue, divided into four vertical rectangular panels. A glossy red spherical doorknob is positioned on the right side, while three gold-colored hinges are aligned vertically along the left edge. The clean lines and simple shading suggest a modern, accessible design suitable for instructional or children’s materials.

Commonly used in educational resources (e.g., fire safety, home security), children’s books, web interfaces for property listings, or DIY home improvement guides where clarity and visual simplicity are prioritized.