Ah yes. It is indeed the case.
The blur is done by the something that is called webkit filter. It is an external function I used in order to apply a blur effect. Therefore it uses the "outer" pixels of the screen to create the blur. Instead of it being a predefined color for everyone, I thought it would be nice if the edges would get a bit of the highest volume color.
What do you think about this feature?

I think you need to make this as separate value. it looks interesting but also kinda weird on dark background.
Blur and shake themselves are cool features. Started using WE again and noticed these two features, love them
P.s. webkit blur freeze wallpaper on first blur.

Thanks for the feedback!
I am aware that the first blur causes freezing, I am looking into solving it.