Add node labels and tweak node colors

src/style.css

@@ -140,17 +140,26 @@ graph-editor {
   cursor: pointer;
 }
 .node.active {
+  fill: #a31dfd;
+}
+.node.accepting.active {
   fill: green;
 }
 .start-arrow {
   fill: #007aff;
   stroke: none;
 }
+.start-arrow.active {
+  fill: #a31dfd;
+}
 .node.accepting {
   outline: 5px solid #007aff;
   outline-offset: 4px;
   border-radius: 50%;
 }
+.node.accepting.active {
+  outline: 5px solid green;
+}
 
 .clickbox {
   stroke: rgba(0, 0, 0, 0);