i think if you go ahead and use it it will not look so bad cut up and used=it will look as if that's how it's supposed to look-
but,
you could simply pick up some fabric dye-and over-dye it....that would even it out.
but i think it will simply look like it's supposed to-
i would re-wash it though just in case it wants to do anything else--
maybe toss in a color catcher and see how it comes out.