Node-REDの画面カスタマイズ方法 ref: http://qiita.com/joeartsea/items/6400e21eefa5a9b44e15

app.js

var http = require('http');
var express = require("express");
var settings = require("./settings"); // <- require
var RED = require("node-red");

// Create an Express app
var app = express();

// Add a simple route for static content served from 'public'
app.use("/",express.static("public"));

// Create a server
var server = http.createServer(app);

// Initialise the runtime with a server and settings
RED.init(server,settings);

// Serve the editor UI from /red
app.use(settings.httpAdminRoot,RED.httpAdmin);

// Serve the http nodes UI from /api
app.use(settings.httpNodeRoot,RED.httpNode);

server.listen(8000);

// Start the runtime
RED.start();

index.html

<link rel="stylesheet" href="style.css" />
<p class="test">Node-REDを組込んだExpressアプリケーション</p>

setting.js

module.exports = {
  httpAdminRoot:"/red",
  httpNodeRoot: "/api",
  functionGlobalContext: { }    // enables global context
};

style.css

.test { color: red; }