gdk_gc_set_foreground(gc, &inst->cols[18]);
gdk_gc_set_foreground(gc, &inst->cols[258]);
void draw_backing_rect(struct gui_data *inst){    GdkGC *gc = gdk_gc_new(inst->area->window);    gdk_gc_set_foreground(gc, &inst->cols[18]);   /* default background */    gdk_draw_rectangle(inst->pixmap, gc, 1, 0, 0,		       inst->cfg.width * inst->font_width + 2*inst->cfg.window_border,		       inst->cfg.height * inst->font_height + 2*inst->cfg.window_border);    gdk_gc_unref(gc);}