Gdk::Color colorconv_synfig2gdk(const synfig::Color &c);
+synfig::Color colorconv_gdk2synfig(const Gdk::Color &color, const synfig::ColorReal& alpha = 1);
void render_color_to_window(const Glib::RefPtr<Gdk::Drawable>& window,const Gdk::Rectangle& ca,const synfig::Color &color);