constrast.js

var textColor = function (bgColor) {
  var output = runNetwork(bgColor);
  if (output.black > .5) {
    return 'black';
  }
  return 'white';
}

var runNetwork = function anonymous(input
/**/) {
  var net = {"layers":[{"r":{},"g":{},"b":{}},{"0":{"bias":7.033599782111697,"weights":{"r":-0.6584023522497092,"g":-9.131572195766312,"b":-1.484211549994347}},"1":{"bias":-1.5180984361560637,"weights":{"r":0.4747268806134254,"g":2.730146205939069,"b":0.6702867737577332}},"2":{"bias":3.687254520355556,"weights":{"r":-0.44971489887101657,"g":-5.102605895582099,"b":-0.8970959129419429}}},{"black":{"bias":3.3101676819516674,"weights":{"0":-11.13417539480403,"1":5.020650886600332,"2":-6.059263260100297}}}],"outputLookup":true,"inputLookup":true};

  for (var i = 1; i < net.layers.length; i++) {
    var layer = net.layers[i];
    var output = {};
    
    for (var id in layer) {
      var node = layer[id];
      var sum = node.bias;
      
      for (var iid in node.weights) {
        sum += node.weights[iid] * input[iid];
      }
      output[id] = (1 / (1 + Math.exp(-sum)));
    }
    input = output;
  }
  return output;
}