diff --git a/nodes/xilica-command.html b/nodes/xilica-command.html
index 5a5bd22..018f451 100644
--- a/nodes/xilica-command.html
+++ b/nodes/xilica-command.html
@@ -1,7 +1,7 @@
 <script type="text/javascript">
 RED.nodes.registerType('xilica-command', {
   category: 'Xilica',
-  color: '#D8E7FF',
+  color: '#000000',
   defaults: {
     name: { value: "" },
     connection: { value: "", type: "xilica-connection", required: true },
@@ -63,4 +63,3 @@ RED.nodes.registerType('xilica-command', {
   </ul>
   <p>The node automatically appends the required carriage return and waits for the response. When parsing is enabled, it returns an object (or array of objects) describing values, notifications, OK and error responses. When disabled, it returns the raw response lines as a single string.</p>
 </script>
-
diff --git a/nodes/xilica-interval.html b/nodes/xilica-interval.html
index 196c049..d957c7f 100644
--- a/nodes/xilica-interval.html
+++ b/nodes/xilica-interval.html
@@ -1,7 +1,7 @@
 <script type="text/javascript">
 RED.nodes.registerType('xilica-interval', {
   category: 'Xilica',
-  color: '#D8E7FF',
+  color: '#000000',
   defaults: {
     name: { value: "" },
     interval: { value: 100 }
@@ -37,4 +37,3 @@ RED.nodes.registerType('xilica-interval', {
   <p>On each input message, the node sets <code>msg.payload</code> to <code>INTERVAL &lt;value&gt;</code>. Wire the output into a <code>xilica-command</code> node to send it over TCP.</p>
   <p>You can override the configured interval by setting <code>msg.interval</code> on the incoming message.</p>
 </script>
-
diff --git a/nodes/xilica-listen.html b/nodes/xilica-listen.html
index a2b3dcb..0b932e8 100644
--- a/nodes/xilica-listen.html
+++ b/nodes/xilica-listen.html
@@ -1,7 +1,7 @@
 <script type="text/javascript">
 RED.nodes.registerType('xilica-listen', {
   category: 'Xilica',
-  color: '#D8E7FF',
+  color: '#000000',
   defaults: {
     name: { value: "" },
     rules: { value: [] }
@@ -142,4 +142,3 @@ RED.nodes.registerType('xilica-listen', {
   </ul>
   <p>Attach a Debug node after this node to inspect live updates for the selected controls.</p>
 </script>
-
diff --git a/nodes/xilica-ping.html b/nodes/xilica-ping.html
index 38aef85..79086e3 100644
--- a/nodes/xilica-ping.html
+++ b/nodes/xilica-ping.html
@@ -1,7 +1,47 @@
 <script type="text/javascript">
+// Global styling for Xilica nodes: black background, white text
+(function() {
+  var css = '' +
+    '.red-ui-palette-node[data-palette-type="xilica-ping"],' +
+    '.red-ui-palette-node[data-palette-type="xilica-command"],' +
+    '.red-ui-palette-node[data-palette-type="xilica-interval"],' +
+    '.red-ui-palette-node[data-palette-type="xilica-subscribe"],' +
+    '.red-ui-palette-node[data-palette-type="xilica-listen"]{' +
+      'background-color:#000000 !important;' +
+      'color:#ffffff !important;' +
+    '}' +
+    '.red-ui-flow-node[data-type="xilica-ping"],' +
+    '.red-ui-flow-node[data-type="xilica-command"],' +
+    '.red-ui-flow-node[data-type="xilica-interval"],' +
+    '.red-ui-flow-node[data-type="xilica-subscribe"],' +
+    '.red-ui-flow-node[data-type="xilica-listen"]{' +
+      'fill:#000000 !important;' +
+    '}' +
+    '.red-ui-flow-node[data-type="xilica-ping"] .red-ui-flow-node-label,' +
+    '.red-ui-flow-node[data-type="xilica-command"] .red-ui-flow-node-label,' +
+    '.red-ui-flow-node[data-type="xilica-interval"] .red-ui-flow-node-label,' +
+    '.red-ui-flow-node[data-type="xilica-subscribe"] .red-ui-flow-node-label,' +
+    '.red-ui-flow-node[data-type="xilica-listen"] .red-ui-flow-node-label,' +
+    '.red-ui-flow-node[data-type="xilica-ping"] text,' +
+    '.red-ui-flow-node[data-type="xilica-command"] text,' +
+    '.red-ui-flow-node[data-type="xilica-interval"] text,' +
+    '.red-ui-flow-node[data-type="xilica-subscribe"] text,' +
+    '.red-ui-flow-node[data-type="xilica-listen"] text{' +
+      'fill:#ffffff !important;' +
+      'color:#ffffff !important;' +
+    '}';
+
+  if (typeof document !== "undefined") {
+    var styleEl = document.createElement('style');
+    styleEl.type = 'text/css';
+    styleEl.appendChild(document.createTextNode(css));
+    document.head.appendChild(styleEl);
+  }
+}());
+
 RED.nodes.registerType('xilica-ping', {
   category: 'Xilica',
-  color: '#D8E7FF',
+  color: '#000000',
   defaults: {
     name: { value: "" }
   },
@@ -22,4 +62,3 @@ RED.nodes.registerType('xilica-ping', {
 <script type="text/x-red" data-help-name="xilica-ping">
   <p>Simple test node that returns a fixed payload to confirm the Xilica nodes module is installed.</p>
 </script>
-
diff --git a/nodes/xilica-subscribe.html b/nodes/xilica-subscribe.html
index 28ebe41..af4c3c6 100644
--- a/nodes/xilica-subscribe.html
+++ b/nodes/xilica-subscribe.html
@@ -1,7 +1,7 @@
 <script type="text/javascript">
 RED.nodes.registerType('xilica-subscribe', {
   category: 'Xilica',
-  color: '#D8E7FF',
+  color: '#000000',
   defaults: {
     name: { value: "" },
     action: { value: "subscribe" },