diff --git a/src/components/Panel.ts b/src/components/Panel.ts
index 08d1fa4..c578b9b 100644
--- a/src/components/Panel.ts
+++ b/src/components/Panel.ts
@@ -10,10 +10,14 @@ export interface PanelOptions extends ContainerOptions {
 
 export class Panel extends Container {
   private bg: Graphics;
+  private _backgroundColor: number;
+  private _alpha: number;
 
   constructor(opts: PanelOptions) {
     super(opts);
     this.bg = new Graphics();
+    this._backgroundColor = opts.backgroundColor ?? 0x000000;
+    this._alpha = opts.alpha ?? 0.8;
     this.drawBackground(opts);
     this.addChild(this.bg);
   }
@@ -21,18 +25,20 @@ export class Panel extends Container {
   private drawBackground(opts: PanelOptions): void {
     this.bg.clear();
     this.bg.roundRect(0, 0, opts.width, opts.height, 8);
-    this.bg.fill(opts.backgroundColor ?? 0x000000);
-    this.bg.alpha = opts.alpha ?? 0.8;
+    this.bg.fill(this._backgroundColor);
+    this.bg.alpha = this._alpha;
   }
 
   resize(width: number, height: number): void {
     this.bg.clear();
     this.bg.roundRect(0, 0, width, height, 8);
-    this.bg.fill(0x000000);
+    this.bg.fill(this._backgroundColor);
+    this.bg.alpha = this._alpha;
   }
 
   setBackgroundColor(color: number): void {
-    this.bg.tint = color;
+    this._backgroundColor = color;
+    this.resize(this.width, this.height);
   }
 }