tailwind.config.js

const {
  default: flattenColorPalette,
} = require("tailwindcss/lib/util/flattenColorPalette");

/** @type {import('tailwindcss').Config} */
module.exports = {
  content: [
    "./src/**/*.{ts,tsx}",
  ],
  darkMode: "class",
  theme: {
    extend: {
      colors: {
        border: "hsl(var(--border))",
        input: "hsl(var(--input))",
        background: "hsl(var(--background))",
        foreground: "hsl(var(--foreground))",
      },
      animation: {
        aurora: "aurora 60s linear infinite",
      },
      keyframes: {
        aurora: {
          from: {
            backgroundPosition: "50% 50%, 50% 50%",
          },
          to: {
            backgroundPosition: "350% 50%, 350% 50%",
          },
        },
      },
    },
  },
  plugins: [addVariablesForColors],
};

// This plugin adds each Tailwind color as a global CSS variable, e.g. var(--gray-200).
function addVariablesForColors({ addBase, theme }) {
  let allColors = flattenColorPalette(theme("colors"));
  let newVars = Object.fromEntries(
    Object.entries(allColors).map(([key, val]) => [`--${key}`, val])
  );

  addBase({
    ":root": {
      ...newVars,
      "--border": "214.3 31.8% 91.4%",
      "--input": "214.3 31.8% 91.4%",
      "--background": "0 0% 100%",
      "--foreground": "222.2 84% 4.9%",
    },
  });
}