“The blurred background visual design, also known as the "bokeh" effect, has been used in photography for many years, but it began to be incorporated into digital design in the mid-2010s. This design trend became popular as a way to draw attention to the foreground content of a website or application by blurring the background, creating a sense of depth and emphasizing the importance of the foreground elements.

The rise of this design trend is also associated with the popularity of mobile devices, which made it possible to create visually stunning designs with blurred backgrounds.”