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.transparent{ background-color: transparent; } Using rgba or hsla color functions, that allow you to add the alpha channel (opacity) to the rgb and hsl functions. Their alpha values range from 0 - 1.
opacity is a CSS property that allows you to change the opaqueness of an element. By default, all elements have a value of 1. By changing this value closer to 0, the element will appear more and more transparent. A common use case is using an image as part of the background.
The opacity property adds transparency to the background of an element, and to all of its child elements as well. This makes the text inside a transparent element hard to read:
In this article, you learned how to use the opacity property of CSS to make images transparent. As CSS remains tricky and a bit weird, it's helpful to combine the opacity property with other CSS features such as positioning in order to put it into proper use.
Set your desired CSS opacity and other properties for the background and use the z-index property to style and position the bContent div. With this you can place the div overtope of the background div without having it's opacity mucked with.
When using the opacity property to add transparency to the background of an element, all of its child elements inherit the same transparency. This can make the text inside a fully transparent element hard to read:
How to Set Opacity in CSS. 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).