how to give a black overlay to an image css code example

Example 1: how to put a black overlay on a photo css

.header {
  background: rgba(0, 0, 0, 0.5); /* Black color with 50% alpha/opacity */
}

Example 2: How to overlay image with color in CSS?

background: linear-gradient(#3204fdba, #9907facc), url(https://picsum.photos/1280/853/?random=1) no-repeat top center;