Design System Accessibility Skill

This skill provides reference data for design token contrast validation, focus ring compliance, and spacing audits. Used by design-system-auditor.agent.md.

WCAG Contrast Ratio - Computation Reference

Step 1: Linearize sRGB Channel

For each channel C in [0, 255]:

c = C / 255
c_lin = c / 12.92              if c <= 0.04045
c_lin = ((c + 0.055) / 1.055)^2.4   otherwise

Step 2: Relative Luminance