text: var colorList = require('css-color-list')()
  
  module.exports = function borderColorClasses() {
    return function(css) {
      var borderColorClasses = colorList.map(function(color) {
        return {
          type: 'rule',
          selectors: ['.border--' + color],
          declarations: [{
            type: 'declaration',
            property: 'border-color',
            value: color
          }]
        }
      })
  
      css.rules = css.rules.concat(borderColorClasses)
    }
  }
  