I'm just wondering how you would delete the blur that has spilled over the edges?
As you can see, on the white background it looks fine.

Anything other than a white background and you can see the white-ish blur has spilt over the edges.

Any way to delete the blur that is over the edges?
Obviously in programmes such as Photoshop you could use various tools to select the outside and delete. I'm thinking of rendering my entire piece in Inkscape then adding the modified Apple mice in Photoshop at the end if there is no method of doing this in Inkscape.
Any help would be gratefully appreciated. Thanks in advance.