# Themes The four brand themes available in this registry, each with its own color palette and design style. > For the complete documentation index, see [llms.txt](/llms.txt). Markdown variants are available by appending `.md` to any URL or sending an `Accept: text/markdown` header. An agent skill is available at [/.well-known/agent-skills/site-skill.md](/.well-known/agent-skills/site-skill.md). Each theme is a distinct color palette and design style, applied through CSS variable overrides — no component code duplication.