refactoring:

color change

src/main/java/BattleShip/GridGUI.java

@@ -16,7 +16,7 @@ public class GridGUI {
     int columns;
     boolean clicked = false;
     boolean endGame = false;
-    Color darkRed = new Color(100, 80, 0);
+    Color darkRed = new Color(100, 0, 0);
     Border loweredBevel = BorderFactory.createLoweredBevelBorder();
 
     Ship destroyer = new Ship(2, "destroyer");