index.js

const bgColors = [
  '#ffffff',
  'rgba(253, 245, 221, 0.6)',
  '#faf8f5',
  'ivory',
  'azure',
  'whitesmoke',
  'aliceblue',
  'snow',
  'seashell',
  'mintcream',
  'linen',
  'honeydew',
  'floralwhite',
  'ghostwhite'
]

const backgroundColor = 'floralwhite'
  , foregroundColor = '#607D8B'
  , accent = 'blueviolet'
  , secondary = 'darkseagreen'

const red = 'darksalmon'
  , green = 'darkseagreen'
  , yellow = 'darkkhaki'
  , blue = 'blueviolet'
  , magenta = accent
  , cyan = 'skyblue'

exports.decorateConfig = (config) => {
  return Object.assign({}, config, {
    fontFamily: ' Consolas, Fira Code, Helvetica Neue, monospace',
    cursorShape: 'UNDERLINE',
    backgroundColor,
    foregroundColor,
    borderColor: backgroundColor,
    cursorColor: accent,
    selectionColor: 'rgba(135, 206, 235, 0.5)',

    colors: {
      red,
      green,
      yellow,
      blue,
      magenta,
      cyan,
      lightRed: red,
      lightGreen: green,
      lightYellow: yellow,
      lightBlue: blue,
      lightMagenta: magenta,
      lightCyan: cyan,
    },

    css: `
      ${config.css || ''}
      .tabs_nav .tabs_list .tab_text {
        color: ${secondary}
      }
      .tabs_nav .tabs_title {
        color: ${secondary}
      }
      .tabs_nav .tab_active {
        border-bottom: 2px solid ${accent} !important
      }
      .tabs_nav .tab_active .tab_text {
        color: ${accent};
        font-weight: 600;
      }
    `
  })
}

function rand(arr = [], min = 0, max) {
  if (!Array.isArray(arr)) {
    throw new Error('First argument must be array!')
  }
  max = max || arr.length
  if (!Number.isInteger(min) || !Number.isInteger(max)) {
    throw new Error('Second/third argument must be integer!')
  }
  if (min > max) {
    throw new Error('Min index can not be greater than max index!')
  }
  const delta = max - min
  const randIndex = min + Math.floor(delta * Math.random())
  return arr[randIndex]
}