Gtk+3动态更改标签颜色不会更改文本背景

#include <gtk/gtk.h>

int main(int argc, char *argv[]) {
    gtk_init(&argc, &argv);

    GtkWidget *window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);

    GtkWidget *label = gtk_label_new("Hello, World!");
    gtk_container_add(GTK_CONTAINER(window), label);

    // 更改标签的前景色（文本颜色）
    GdkRGBA foreground_color;
    gdk_rgba_parse(&foreground_color, "red");
    gtk_widget_override_color(label, GTK_STATE_FLAG_NORMAL, &foreground_color);

    // 更改标签的背景色
    GdkRGBA background_color;
    gdk_rgba_parse(&background_color, "blue");
    gtk_widget_override_background_color(label, GTK_STATE_FLAG_NORMAL, &background_color);

    gtk_widget_show_all(window);
    gtk_main();

    return 0;
}