Ok so.. The background looks ok, but in this sig it just looks like you made the background and the render was just pu there, it doesn't fit at all. The purple one is quite ..ok.. Also it has no flow at all, and try to avoid using white borders.. for this one it doesn't look good at all. Better use just a 1px black border, or 2px depends of the sig, or a very dark version of the main color from the sig.
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