How do I modify this colored Mesh in Illustrator?

Question

I have this nifty glowing ring in an EPS file. I am trying to figure out how to use Illustrator to have the same blue ring with a white background.

I'm having difficulty understanding where the black background comes from. I know that the layout of the file is a number of overlapping circles, then a single mesh that results in the final output. When the Mesh is hidden:

On that Mesh, I think the blue color is controlled through the "Recolor Artwork" dialog

Knowing now how the effect is constructed, how would I go about having the same blue effect with a white background?

Answer 1

One way of doing it would be by inverting colors. First expand artwork.

select the artwork >Edit >Edit Colors>Invert colors

This way your black areas become white. But you will have to recolor artwork after, since colors other than black and white turn into other colors on inverting .

Answer 2

Its hard to tell exactly but I'm almost 100% sure that you should look into Appearance panel (Shift+6) or (Window>Appearance), and check blending modes.

Without examining file it will be hard to tell :)