color of gtk widget

[Prasanna Kumar K <prasanna tataelxsi co in>]

Hi,

 I have a GtkWidget "Button. I want the color of the button should be complete red.

I have used this

GdkColor color;
gdk_color_parse ("red", &color);
gtk_widget_modify_fg (Button, GTK_STATE_NORMAL, &color);

But this doesn't make the whole button red. it just paints the border of the button with red color.

What to do the complete make the button, red.