@SuppressWarnings("UseJBColor")
    @Override
    protected void paintComponent(Graphics g) {
      final Insets i = getInsets();

      final Dimension d = getSize();

      final int left = i.left + (d.width - i.left - i.right - WIDTH) / 2;
      final int top = i.top + (d.height - i.top - i.bottom - HEIGHT) / 2;

      g.setColor(Color.WHITE);
      g.fillRect(left, top, WIDTH, HEIGHT);

      g.setColor(Color.GRAY);
      g.drawLine(left + 1, i.top + HEIGHT / 2, left + WIDTH - 3, i.top + HEIGHT / 2);
      g.drawRect(left + 1, top + 1, WIDTH - 3, HEIGHT - 3);


      for (int k = 1; k < 10; k++) {
        g.drawLine(left + 1 + k * 31, top + 1, left + 1 + k * 31, top + HEIGHT - 3);
      }

      for (int r = 0; r < myRecentColors.size(); r++) {
        int row = r / 10;
        int col = r % 10;
        Color color = myRecentColors.get(r);
        g.setColor(color);
        g.fillRect(left + 2 + col * 30 + col + 1, top + 2 + row * 30 + row + 1, 28, 28);
      }
    }
@SuppressWarnings("UseJBColor")
    @Override
    protected void paintComponent(Graphics g)