What is meant by opacity in CSS?

The CSS opacity property is used to specify the transparency of an element. In simple word, you can say that it specifies the clarity of the image. In technical terms, Opacity is defined as degree in which light is allowed to travel through an object. How to apply CSS opacity setting.

How to set the opacity of background image in CSS?

Set the background-color as #cc33ff and opacity value 0.4 after selecting the transparent class in CSS. If we want the heading and its background color to get more transparent, we can decrease opacity value. The example below shows that the background color and the heading h1 get transparent as we keep the opacity value, i.e. 0.4.

How to set background color in CSS?

CSS background-color property syntax. To apply a CSS background color, you need to follow the syntax example below: background-color: value; The default value for this property is transparent. You can change it using the name, RGB or HEX value of the color you choose: