Answers for "add opacity to image background html"

transparent background css for image

background-color: rgba(255, 0, 0, 0.5);

background image opacity css

/* Two ways to make images opaque */

div {
	background-color : rgba(120, 120, 120, 0.5) 
   	/* the 0.5 is the value of opacity on a scale of 0-1 */
}

/* OR */

div {
	background-color : blue
    opacity : 50%
}