To set the opacity of a background, image, text, or other element, you can use the CSS opacity property. Values for this property range from 0 to 1. If you set the property to 0, the styled element will be completely transparent (ie. invisible). If you set the property to 1, the element will be completely opaque.

The Opacity Property in CSS sets the transparency level of an element and its contents. Accepting values between 0 (fully transparent) and 1 (fully opaque), affects the entire element, including its children, making it a simple and effective way to control transparency in web design. Syntax: div { opacity: 0.5; }

Alternatively, you can use rgba to set the opacity of an element:.class-name{ background-color: rgba(0, 0, 0,.5); } This sets the background-color of an element to black with 50% opacity. The last value in an rgba value is the alpha value. An alpha value of 1 is equal to 100% opacity, and 0.5 (or.5 like above) is equal to 50% opacity.