feat: add color to substructure highlight

src/component/component.js

@@ -118,12 +118,14 @@ class pdbLigandEnv extends LitElement {
   //   this.display.showWeights(contactType);
   // }
 
-  set highlightSubstructure(substructure) {
+  set highlightSubstructure(substructure, color) {
     if (!this.display) {
       return;
     }
-    this.display.addLigandHighlight(substructure, this.highlightColor);
     this.substructureHighlight = substructure;
+    this.highlightColor = color;
+    this.display.addLigandHighlight(this.substructureHighlight, this.highlightColor);
+    
   }
 
   set highlightColor(data) {