"CSS" matching MCP connectors:

rnv-color-mcp, a hosted color-workflow MCP server (Python, Streamable HTTP). Tools: mix (including Kubelka-Munk paint physics), convert between formats, generate harmonies, transform text case, and save/list/get named palettes. It resolves hex / CSS / custom brand color names and refuses unknown colors rather than guessing.

AI-agent design tools: fonts, palettes, color naming & extraction, contrast, code, SVG, CSS.

On-demand drift checks: declared CSS color, radius, spacing & type vs your own tokens or a pack

Curated design references for AI — real CSS values, typography specs, and color palettes.