Refratoring background color

src/main/java/BattleShip/AIGridGUI.java

@@ -343,7 +343,7 @@ public class AIGridGUI extends JPanel {
         if(s == null) {
             //If no ship in that cell, mark as a miss.
             text = "Other player missed. Your turn.";
-            b.setBackground(Color.BLUE);
+            b.setBackground(Color.lightGray);
         } else {
             //Check if guess killed a ship.
             killed = s.counter();