JavaScript string to color

str2color.js

function str2num (str) {
  var hash = 0, i, chr, len;
  if (str == 0) return hash;
  for (i = 0, len = str.length; i < len; i++) {
    chr   = str.charCodeAt(i);
    hash  = ((hash << 5) - hash) + chr;
    hash |= 0;
  }
  return hash;
};

function str2color (str) {
  var hash = str2num(str);
  return {
    r: (hash & 0xFF0000) >> 16,
    g: (hash & 0x00FF00) >> 9,
    b: (hash & 0x0000FF),
    rgba: function() {
      return 'rgba(' + this.r + ', ' + this.g + ', ' + this.b + ', 1)';
    },
    hex: function () {
      return '#' + ((1 << 24) + (this.r << 16) + (this.g << 8) + this.b).toString(16).slice(1);
    }
  };
}

function uuid2str (uuid) {
  if (!/[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}/.test(uuid)) {
    return null;
  }
  var parts = uuid.replace(/\-/g, '');
  parts = [
    parts.substring(0, 8),
    parts.substring(8, 16),
    parts.substring(16, 24),
    parts.substring(24, 32)
  ].map(str2num);
  
  var vowels = [
    'a', 'e', 'i', 'o', 'u',
    'ai', 'eu', 'oi', 'ou'
  ];
  var consonants = [
    'r', 't', 'y', 'p', 's', 'd', 'f', 'g', 'k', 'l', 'm', 'w', 'v', 'b', 'n',
    'tr', 'pr', 'sr', 'dr', 'fr', 'gr', 'kr', 'vr', 'br',
    'bl', 'sl', 'pl', 'kl',
    'sk', 
  ];
  var syllables = [];
  consonants.forEach(function (consonant) {
    vowels.forEach(function (vowel) {
      syllables.push(consonant + vowel);
    });
  });
  parts = parts.map(function (part, i) {
    return syllables[Math.abs(part) % syllables.length];
  });
  return parts.join('');
}