Kolor tła Java Gridpane
GridPane pane = new GridPane();
pane.setBackground(new Background(new BackgroundFill(Color.AQUA, CornerRadii.EMPTY, Insets.EMPTY)));
YaKiCode
GridPane pane = new GridPane();
pane.setBackground(new Background(new BackgroundFill(Color.AQUA, CornerRadii.EMPTY, Insets.EMPTY)));