Purpose: Read this when the diagram must remain understandable for color-vision deficiency, screen-reader use, or plain-text fallback. Shape and pattern differe
The Accessibility skill ensures diagrams and visual content remain clear and understandable for users with color-vision deficiencies, screen readers, or environments lacking reliable color or layout rendering. It enforces design rules like using CVD-safe palettes, pairing color with shape or pattern differences, and providing alt text and ASCII fallbacks to communicate meaning beyond color alone. This skill guides the creation of inclusive visuals that meet common accessibility standards, reducing the risk of misinterpretation and improving usability across diverse audiences.
This skill is essential for performance marketers and growth leads responsible for data visualization in reports or dashboards that reach broad or regulated audiences. SEO and PPC operators creating campaign flowcharts or funnel diagrams benefit by ensuring their visuals comply with accessibility best practices, avoiding exclusion of users with visual impairments. Agency strategists producing client-facing documentation or presentations can use this skill to maintain clarity and professionalism while meeting accessibility requirements.
Practitioners start by selecting a color palette limited to CVD-safe tones like blue, teal, and coral, avoiding problematic red-green or blue-yellow combinations. Next, they apply shape, pattern, or line-style differentiation to encode meaning beyond color, such as dashed edges for warnings or distinct node shapes for critical states. Then, alt text is crafted using a structured formula that summarizes the diagram’s purpose, flow, and key risks. Finally, they decide when to trigger ASCII fallback output for environments like terminals or screen readers where color and layout fidelity are compromised.
How do I ensure diagrams are usable for colorblind users? Use CVD-safe colors combined with shape and pattern differences—never rely on color alone. When should I provide ASCII fallback? When the viewing environment does not reliably render color or layout, or when users request plain-text output. What’s the best way to write alt text for diagrams? Follow the formula of stating purpose, describing major flows, and highlighting key transitions or risks in a single short paragraph.
Attach the Accessibility skill to agent tasks that generate or evaluate visual content to automatically check for color and shape differentiation, alt text presence, and fallback triggers. The skill flags issues like red-only signals or missing labels and suggests fixes based on the accessibility checklist. Once enabled, expect clear guidance on making diagrams inclusive and readable across various platforms and user needs. This integrates seamlessly with other content skills to elevate your documentation quality and compliance.
For broader context, see our roundup of marketing skills claude, and read common Claude Code content mistakes for related setup guidance.