Huecode

Turn a few words or an image into an accessible Tailwind color palette. See it on real interface mockups in light and dark, then copy the code.

	Light	Dark
App
Components
Marketing

What it does

• Generate from text or an image. Type a theme like "sunset over the sea" or start from an image. Plain text generation works offline and gives the same palette for the same words. Shuffle produces variations.
• AI enhancement (optional). With an API key for Anthropic, OpenAI or Gemini, the text path can ask a model for a palette instead.
• A full scale per role. Each color role gets an 11-step shade scale, plus semantic tokens for light and dark themes.
• Live preview. The palette is applied to App, Components and Marketing mockups, in light and dark, with soft or sharp corners.
• Export. Copy or download the result as Tailwind v4, Tailwind v3, CSS variables or TypeScript tokens. Every format includes both the shade scale and the semantic light and dark tokens.

Quick start

Requires Node 22.

git clone https://github.com/larisabarabas/huecode.git
cd huecode
npm ci
npm run dev

Then open http://localhost:5173. The API runs on port 8787.

Scripts

Command	What it does
npm run dev	Web app and API together, with reload
npm run build	Type-checks the app and the server, then builds
npm test	Runs the Vitest suite
npm start	Runs the API server

AI enhancement and your API key

Everything except AI enhancement works with no key at all.

To use the AI path, copy .env.example to .env and set a key for one provider: ANTHROPIC_API_KEY, OPENAI_API_KEY or GEMINI_API_KEY. If you set more than one, choose with AI_PROVIDER (anthropic, openai or gemini). AI_MODEL overrides the provider's default model. Keys are read only on the server (server/ai/config.ts) and are never sent to the browser, and the app has no place to type a key in. Without a key, the server reports AI as unavailable through /api/config and the app hides the AI option.

The server limits AI requests to 30 per hour per client. On serverless hosts this limit is best-effort. Requests to the AI path use your key and can cost money, so keep it out of version control. .env is already in .gitignore, and setting a spend limit in your provider's console is a good idea.

Output token limit

Each AI request is capped at 700 output tokens, which is plenty for eight HSL colors and a one-sentence rationale. The cap is the MAX_OUTPUT_TOKENS constant in server/ai/palette.ts, and all three providers use it. It is not an environment variable, so change it in that file. Raise it if your model is cut off before it finishes a palette. Models that spend tokens on internal reasoning before answering are the likeliest to need more. A cut-off shows up as "AI palette generation failed" in the app and a "did not include a palette proposal" error in the server log.

The hosted demo

The hosted demo runs on the maintainer's key, which lives in the host's environment settings and not in this repository. That key has a monthly spend cap, and the demo tells you so next to the AI toggle. If the cap is reached, AI pauses and the standard generator keeps working. The server remembers the pause in memory for 30 minutes, so on serverless hosts it is best-effort: the first request on each instance may still fail before the toggle shows as paused. For unlimited use, self-host with your own key. Set AI_DEMO_MODE=true only if you run a public instance on a capped shared key and want the same notice.

Branding

The header logo link and the footer link are set at build time, so forks aren't tied to the original maintainer's links. VITE_HOME_URL sets where the logo links and defaults to /. VITE_REPO_URL sets the footer's "Open source on GitHub" link and defaults to the upstream repository. Point it at your fork, or set it to an empty string to hide the footer. VITE_SUPPORT_URL sets the "Buy me a coffee" link in the footer and code drawer. It defaults to the upstream maintainer's page, so point it at your own or set it to an empty string to hide it. Set them before npm run build (see .env.example).

Fonts

The interface loads Instrument Sans and JetBrains Mono, both open-licensed, from Google Fonts at runtime. That means Google receives a request when the page loads.

Roadmap

A snapshot of what's planned. Priorities can change, and an issue is the place to discuss anything here.

The direction: Huecode turns a vibe or a brand color into an accessible theme that drops into your shadcn or Tailwind project. A feature earns a place here if it shortens the path from a palette to a running codebase.

Now

• Undo and redo for every change, and a Generate that no longer overwrites the palette with no way back
• A loading state for AI generation, so the palette doesn't look frozen while waiting
• shadcn/ui theme export, with an oklch option
• Showing the raw colors the AI proposed, before the shade scales are built

Next

• Start from your own brand color
• One Export sheet with a "Copy as agent prompt" option, so a palette can be pasted into Claude Code, Claude Design or an AI app builder like Lovable with instructions for applying it
• Design-tokens JSON export, for importing into Figma
• Editing the base colors, swapping which color has which role, and a contrast check that keeps edits accessible
• A shareable link that recreates a palette
• A contrast report for the semantic color pairs

Later

These wait until there's evidence they're needed.

• Steering AI palettes (warmer, bolder, calmer) and a set of test prompts to measure how close results are to what people expect
• More accurate color extraction from images, starting with tuning the in-browser extraction before adding a separate service
• Typography: font tokens in the exports, then a few curated font pairings
• Previewing a palette on your own HTML or Tailwind markup in a sandboxed frame, or with a bookmarklet
• A shadcn registry endpoint, a command-line tool and an MCP server
• Importing an existing theme from globals.css or a Tailwind config

Not planned

A Figma plugin, accounts and saved palettes, proxying real websites for preview, per-shade editing, and a public palette gallery.

Contributing

Contributions are welcome, and Huecode works issue-first: open an issue before you write code, for everything. See CONTRIBUTING.md for the scope, setup and PR checklist. To report a security problem privately, see SECURITY.md.

Support

Huecode is free and open source. If it saved you time, you can buy me a coffee. Starring the repo and sharing it helps too.

License

MIT © 2026 Stefania Barabas