diff --git a/gui/ngXosViews/serviceTopology/src/css/serviceTopology.css b/gui/ngXosViews/serviceTopology/src/css/serviceTopology.css
index 2afcf08..b241361 100644
--- a/gui/ngXosViews/serviceTopology/src/css/serviceTopology.css
+++ b/gui/ngXosViews/serviceTopology/src/css/serviceTopology.css
@@ -4,6 +4,11 @@
     display: block;
 }
 
+service-canvas svg {
+    position: absolute;
+    top: 0;
+}
+
 .node {
     cursor: pointer;
 }
@@ -19,6 +24,14 @@
     stroke: #ffdb07;
 }
 
+.node.slice circle {
+    stroke: #b01dff;
+}
+
+.node.instance circle {
+    stroke: #ea25ff;
+}
+
 .node rect.slice-detail{
     fill: #fff;
     stroke: steelblue;