GtkWidget, change background color

Question

Sorry, I'm newbie in the Gtk, so it is may be the stupid question. I use Gtk+ 3.0 and have this code

GtkWidget *widget;
widget=gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 2);
gtk_box_pack_start(GTK_BOX(widget), some_label, FALSE, FALSE, 0);

How can I change the background color of the widget? I'm trying that

GdkColor red = {0, 0xffff, 0x0000, 0x0000};
gtk_widget_modify_bg(widget, GTK_STATE_NORMAL, &red);

and some other examples, but no one of them worked for my case.

user_10567451 · Answer

In GTK+3 3.22 this markup code inside the text works.

gchar *text = "I'm a colored label";

gtk_label_set_text(GTK_LABEL(label), text);
gtk_label_set_use_markup(GTK_LABEL(label), TRUE);