Tailwind CSS, Default color palate not accessible

const defaultTheme = require('tailwindcss/defaultTheme');
const colors = require('tailwindcss/colors');
module.exports = {
  content: ["./index.html"],
  theme: {
    extend: {
      colors: {
        'black': '2B2B2B',
        'white': 'FFFFFF',
        'green': '8EBB33',
        'orange': 'FD7E4E',
        'grey': '3C5C6A',
        'darkGrey': '325462',
      },
    },
  },
}