function _setTags (colors) {
  // reset all
  _openTags['0'] = 'font-weight:normal;opacity:1;color:#' + colors.reset[0] + ';background:#' + colors.reset[1]
  // inverse
  _openTags['7'] = 'color:#' + colors.reset[1] + ';background:#' + colors.reset[0]
  // dark grey
  _openTags['90'] = 'color:#' + colors.darkgrey

  for (var code in _styles) {
    var color = _styles[code]
    var oriColor = colors[color] || '000'
    _openTags[code] = 'color:#' + oriColor
    code = parseInt(code)
    _openTags[(code + 10).toString()] = 'background:#' + oriColor
  }
}
Expose tags, including open and close.
@type {Object}