The background is transparent, so choose whatever color/gradient you like. The screenshots give some examples. Also, make sure you select to center the image and keep the aspect ratio as it is ridiculously large and made to be centered.
About the picture:
This is a design I originally created for a t-shirt to make Japanese people say, "Huh?"
The shadowed Japanese text reads, "A fish sandwiched between two cutting boards." It's a play on words mixing "Between a rock and a hard place" and "Confronted with a hopeless situation." So there is some hidden meaning in this artwork. And that meaning is.....cutting boards make good armor?
I also have an svg version if anyone is interested. Opinions are welcome and I can tweak the image.
Screenshot two uses blue as a background...It feels a bit less violent and more funny than screenshot one.
Screenshot three is the original svg version. If you're going to use it in a project, please give credit where it's due.