Dark Theme Color Fixed

Author: yashugarg

lib/src/simulations/bubble_sort.dart

@@ -248,7 +248,7 @@ class _BubbleSortBarsState extends State<BubbleSortBars> {
       body: Stack(
         children: <Widget>[
           Container(
-            color: Theme.of(context).accentColor,
+            color: Colors.grey[900],
             child: Stack(
               children: <Widget>[
                 for (var k = 0; k < _elements.length; k++)