So I just made a Signature in GIMP, and it involves Transparency, So that the Gradient shows well, is there any background I could put in there so that the Gradient wouldn't look horrible? Without affecting the Gradient, I have the layers set to a bunch of different types, and when I add a background color, everything goes hay-wire and changes colors. So is there anyway I could add a background without it affecting the layers above it?

See how the white just looks weird as the background? Is there something I could put as a background that wouldn't affect the layers above it and make them change colors?
Sorry if this is confusing, it is very hard to explain
I added a screenshot of what I am hoping to get, something like that, so that it will not look so bad, or could you guys suggest a background that would match... if nothing else.

I think I am just gonna live with this.