how to blur background with css code example

Example 1: how to blur background color in css

background: rgba(255,255,255,0.5);
backdrop-filter: blur(5px);

Example 2: how to blur the background image in html

.bg-image {
    /* The image used */
    background-image: url("photographer.jpg");

    /* Add the blur effect */
    filter: blur(8px);
	-webkit-filter: blur(8px);

	height: 100%;
    background-position: center;
}