Fly/Flower Colour Co-ordination

I was hanging out washing in the garden and noticed that some hoverflies seemed to be paying one of my Hosta flowers some interest.  This particular pot of Hostas is tucked around a corner in a very shady area so the flowers bloom later than others in the garden.  When I looked closely I noticed that the colours of the hoverfly's body matched the colour of the Hosta's anthers...is that just a coincidence I wonder.

I've added a close up of one of the pretty flower buds in extras (best seen in large).

Very annoyingly I seem to have gone down with a summer cold.  I woke with a sort throat which has got worse and I generally feel more than a bit under the weather, hence just a garden photo today. I didn't want to go out and spread my germs.