Background color for incense smoke images

[wmchauncey]

Am using incense smoke images to create different formed images, via PS, and am in a quandary as to appealing background colors.
Should I be using complementary, opposite, colors from the subject or more of a analogous, similar, color scheme?
The example below is merely an inverted color scheme.  Selecting a color seems to be easier than is selecting the proper color.

[Jeremy Roussak]

Black background. I think the foreground colour probably matters less.

Jeremy

[wmchauncey]

All the wisdom contained within these pages and no one, save one, has an opinion concerning colors.

[Jeremy Roussak]

All the wisdom contained within these pages and no one, save one, has an opinion concerning colors.

Maybe they all agree with me 

Jeremy

[Wayne Fox]

This seems to be an artistic endeavor.  I'm not sure what would look "best", but seems it's about your vision and goals. I have no advice other than trust your own instincts.