how to blur background color in css
background: rgba(255,255,255,0.5);
backdrop-filter: blur(5px);
how to do a background blur in css
/* Answer to "blur behind element css" */
/*
This blurs everything behind the element it's applied to
*/
backdrop-filter: blur(10px);
add blur background css
backdrop-filter: blur(5px);
Source: blog.prototypr.io