color-palette-api

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Color palette generation API — harmonies, gradients, contrast checking, WCAG accessibility scoring, CSS/Tailwind output. Zero external dependencies.

Quick Start

npm install && npm start  # http://localhost:4000

Endpoints

Convert

curl http://localhost:4000/api/v1/convert/ff6b35
# → {"hex":"#ff6b35","rgb":{"r":255,"g":107,"b":53},"hsl":{"h":16,"s":100,"l":60}}

Color Harmonies

# Types: complementary, analogous, triadic, split, tetradic, monochromatic
curl http://localhost:4000/api/v1/harmony/complementary/ff6b35
curl http://localhost:4000/api/v1/harmony/triadic/3498db
curl http://localhost:4000/api/v1/harmony/monochromatic/e74c3c?count=7

Gradient

curl "http://localhost:4000/api/v1/gradient/ff6b35/3498db?steps=7"
# → colors array + CSS gradient string

Contrast / WCAG Accessibility

curl http://localhost:4000/api/v1/contrast/000000/ffffff
# → {"ratio":21,"AA_normal":true,"AA_large":true,"AAA_normal":true,"AAA_large":true}

curl http://localhost:4000/api/v1/contrast/ff6b35/ffffff
# → Check if your orange text passes accessibility on white background

Random Palette

curl "http://localhost:4000/api/v1/random?count=5"

CSS Variables

curl -X POST http://localhost:4000/api/v1/css \
  -H "Content-Type: application/json" \
  -d '{"colors":["#ff6b35","#3498db","#2ecc71"], "name":"brand"}'

Tailwind Config

curl -X POST http://localhost:4000/api/v1/tailwind \
  -H "Content-Type: application/json" \
  -d '{"colors":["#fef3c7","#fde68a","#fcd34d","#fbbf24","#f59e0b","#d97706","#b45309","#92400e","#78350f","#451a03"], "name":"amber"}'

License

MIT

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