Getting Matplotlib's GTK Agg backend to respect user theming

I'm writing a PyGTK/Twisted app that uses Matplotlib for graphing. It's easy enough to embed the plots in my widgets using the FigureCanvasGtkAgg, but I notice that the background colour of the canvas (outside the plot area itself) does not match that for the rest of my application, and neither does the font (for labels, legends, etc).

Is there a simple way to get my graphs to respect the user selected GTK theme?