Don't include navigation elements — screenshot shows a single error message.
Don't use brand colors — screenshot shows only black and gray text.
Don't use complex layouts — screenshot shows a simple left-aligned text block.
Don't add animations — screenshot is a static error page.
Avoid: Brand voice
Avoid: Personality
Avoid: Marketing
11
System prompt
This is a standard browser error page for a site that cannot be reached. It uses default system fonts and black/white colors with no branding or custom UI elements. Key colors are white background and black text. Font categories are system-sans-serif and system-mono. Critical donts: Do not add brand identity or custom design elements; this is a raw system page. Do not introduce custom typography. Do not add interactive components. Do not use colored backgrounds or gradients. Do not include complex layouts or grids. Do not add motion or transitions. The page serves as a fallback when a site is unavailable.
Bring this taste to your agent
Hand your AI agent a machine-readable spec of this design — tokens, type, motion, the whole DNA.
