Colour Memory

The cultural colour intelligence layer for AI agents, designers, and brands.

Tens of thousands of named colours across dozens of cultural archives. Every result provenance-labelled: documented fact, source type, and inferred hex always separated. Not generated. Not hallucinated.

What it is

Every other colour API tells you what colours go together. Colour Memory tells you what they mean.

The difference is the archive. Tens of thousands of colours, each provenance-labelled with source type, cultural consequence data, and material context. No LLM names colours. No hallucination. Every result separates what is documented, what is inferred, and what is interpretive.

"Patna Opium Ball White. Bengal Opium Agency Annual Report 1833. The factory produced over 4,000 chests annually, graded by the whiteness of the outer coating."

That is a colour with a receipt. No other API produces that.

Related MCP server: MCP Color Converter

Why it matters for AI

AI agents make colour decisions without cultural memory. They generate hex values with no understanding of what those colours carry historically, what they mean across markets, or whether they will land badly with a global audience.

Colour Memory gives agents a grounded colour intelligence layer. Every result includes archive source, cultural consequence, market risk, and confidence score. Hallucination risk is structurally eliminated because no LLM names colours -- the names come from the archive.

The archives

Ancient Rome, Anglo-Saxon, Architecture, Austen, Australia, Brazil, Byzantine Empire, China, Dark History, Denmark, Dickens, EIC (East India Company), Finland, Football Strips, France, Georgian Pleasures, Germany, India, Islamic, Italy, Japan, Keats, Korea, Medieval Europe, Mexico, Military, Morocco, Netherlands, Nigeria, Norman Medieval, Norway, Ottoman Empire, Oxfordshire, Pigment, Pigment Historical, Plantagenet, Racing Silks, Roman Britain, Shakespeare, Space and Stars, Spain, Stuart Georgian, Sweden, Switzerland, Tingry, Tudor, USA, Viking Norse, Werner-Syme.

Quick start

Claude Desktop

claude mcp add --transport http colour-memory https://api.colourmemory.com/mcp

Or add to claude_desktop_config.json:

{
  "mcpServers": {
    "colour-memory": {
      "type": "http",
      "url": "https://api.colourmemory.com/mcp",
      "headers": { "X-Api-Key": "YOUR_KEY" }
    }
  }
}

Get a free key (no card required): https://colourmemory.com/start

Try these prompts in Claude

• What does the colour #D4A829 mean historically and culturally?

• Build a palette for a Japanese luxury brand avoiding colours with negative cultural associations.

• Is our brand colour #C0392B safe to use in a healthcare app targeting UK and Japanese markets?

Any MCP client (ChatGPT, Cursor, Windsurf)

Add this URL: https://api.colourmemory.com/mcp

REST API

# Match a hex to the archive
curl -X POST https://api.colourmemory.com/query/hex
  -H "X-Api-Key: YOUR_KEY"
  -H "Content-Type: application/json"
  -d '{"hex": "D4A829"}'

# Query by concept or cultural brief
curl -X POST https://api.colourmemory.com/query/conceptual
  -H "X-Api-Key: YOUR_KEY"
  -H "Content-Type: application/json"
  -d '{"query": "Ottoman luxury"}'

# Brand audit
curl -X POST https://api.colourmemory.com/brand/audit
  -H "X-Api-Key: YOUR_KEY"
  -H "Content-Type: application/json"
  -d '{"palette": ["#D4A829","#1A5C6E","#0F2D6B","#0A0A0B"]}'

Get your key at colourmemory.com

Pricing

Explorer: Free, no card, 25 archive calls, 3 intelligence credits Developer: Free, email required, 500 archive calls, 10 intelligence credits Studio: £12/month, 2,000 archive calls, 50 intelligence credits Pro: £39/month, 10,000 archive calls, 200 intelligence credits Founder Enterprise: £299/month (20 slots only), 50,000 archive calls, 500 intelligence credits

Full details: https://colourmemory.com/pricing

Architecture

• Runtime: FastAPI on Railway

• Search: CIEDE2000 nearest-neighbour with sentence-transformer semantic index

• Colour science: CIE Lab, LRV, chroma, three-illuminant simulation

• Auth: X-Api-Key header

• MCP endpoint: https://api.colourmemory.com/mcp

• Persistent storage: PostgreSQL on Railway

• Discovery: https://api.colourmemory.com/llms.txt · https://api.colourmemory.com/.well-known/agent.json

Brand colours

Every Colour Memory brand colour was selected through the API itself.

• Song Gold Sycee #D4A829 -- China archive, Song dynasty

• Northanger Abbey Pool #1A5C6E -- Austen archive

• Saimaa Juhannus #0F2D6B -- Finland archive

• Velvet Black #0A0A0B -- Werner-Syme 1814

• Archive Parchment #F4EFE5 -- Architecture archive

Legal

UK Trademark 00004387450, Classes 9, 35 and 42, 2026 PR Eye Ltd, Oxfordshire

colourmemory.com / hello@colourmemory.com