theme.js

import { base } from '@theme-ui/presets'

module.exports = {
  ...base,
  colors: {
    text: '#000',
    background: '#fff',
    primary: '#07c',
    secondary: '#30c',
    muted: '#f6f6f6',
    modes: {
      dark: {
        text: '#fff',
        background: '#060606',
        primary: '#3cf',
        secondary: '#e0f',
        muted: '#191919',
      },
    },
  },
}