It is a sin to choose the same colour for background and foreground, and it is rather difficult to use complementary colours. Especially if the background is artificial and has a pattern in it not looking quite natural.
So here those two problematic photos which I made only to teach one of my nephews the art of photography:
But then when I later took a closer look at them I found both those photos quite nice, and worth showing here on this blog; they weren't meant to be shown here, you know.
(Oh, and don't ask me for the exact Latin name for those flowers; they're only Schnittblumen after all.)