claude mcp add --transport http hueproof https://plugins.dudelemon.cloud/hueproof/mcpRun this in your terminal. Add --scope user to use it in every project.
HueProof is a WCAG color contrast checker for AI assistants. It measures the WCAG 2.2 contrast ratio for any text and background, with pass or fail at AA and AAA and the APCA value from the WCAG 3 draft, and finds the nearest passing color while keeping the hue.
It builds a complete light and dark theme from one brand color with every token passing, exports it to Tailwind, design tokens, SCSS, SwiftUI and Android, pulls the palette out of a logo or screenshot, checks text over photos and gradients with the overlay that fixes it, audits a live site's stylesheet, and makes chart colors that color-blind readers can tell apart.
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Write the first reviewWCAG 2.2, with ratios never rounded up, plus APCA from the WCAG 3 draft as extra guidance.
Hex, rgb(), hsl(), oklch(), oklab() and the 148 CSS color names.
With the Machado, Oliveira and Fernandes (2009) model at full severity, plus a greyscale view. Pairs closer than 8 in OKLab distance are flagged.
Yes. HueProof is free and needs no account or API key.
Add https://plugins.dudelemon.cloud/hueproof/mcp to your assistant as a remote MCP server. In Claude Code: claude mcp add --transport http hueproof https://plugins.dudelemon.cloud/hueproof/mcp