CSS Backgrounds

CSS Tutorial


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CSS Advanced


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CSS Responsive

CSS Grid

CSS Backgrounds

The CSS background properties is used for adding the background effects for elements

CSS background-color

The background-color property defines the background color of an element.

				
					<p>Set Background</p>
<h2 style="background-color: lightblue;">Background-Color</h2>
				
			

Output

Set Background

Background-Color

With CSS, a color is most often specified by:

  • a valid color name – like “red”
  • a HEX value – like “#ff0000”
  • an RGB value – like “rgb(255,0,0)”

Other Elements

The background color for any HTML elements can be set:

Example

Here, the <h1>, <p>, and <div> elements will consists of different background colors:

HTML
				
					<h6>CSS background-color example!</h6>
<div>
This is a text inside a div element.
<p>This paragraph has its own background color.</p>
We are still in the div element.
</div>

				
			

CSS

				
					h6 {
  background-color: green;
}
div {
  background-color: lightblue;
}
p {
  background-color: yellow;
}

				
			

Output

CSS background-color example!
This is a text inside a div element.

This paragraph has its own background color.

We are still in the div element.

Opacity / Transparency

The opacity property defines the opacity/transparency of an element. The value ranges from 0.0 – 1.0. The lower value, the more transparent:

HTML

				
					<h1>Transparent Boxes</h1>
<p>When using the opacity property to add transparency to the background of an element, all of its child elements become transparent as well. This can make the text inside a fully transparent element hard to read:</p>
<div class="first">
  <h1>opacity 0.1</h1>
</div>
<div class="second">
  <h1>opacity 0.3</h1>
</div>
<div class="third">
  <h1>opacity 0.6</h1>
</div>
<div>
  <h1>opacity 1 (default)</h1>
</div>

				
			

CSS

				
					div {
  background-color: green;
}
div.first {
  opacity: 0.1;
}
div.second {
  opacity: 0.3;
}
div.third {
  opacity: 0.6;
}

				
			

Output

Transparent Boxes

When using the opacity property to add transparency to the background of an element, all of its child elements become transparent as well. This can make the text inside a fully transparent element hard to read:

opacity 0.1
opacity 0.3
opacity 0.6
opacity 1 (default)

Transparency using RGBA

If you don’t want to define the opacity to child elements, like in the example above, you may use the RGBA color values. The following example sets the opacity for the background color and not the text:

HTML

				
					<h1>Transparent Boxes 2</h1>
<p>Result with opacity:</p>
<div style="opacity:0.1;">
  <h1>10% opacity</h1>
</div>
<div style="opacity:0.3;">
  <h1>30% opacity</h1>
</div>
<div style="opacity:0.6;">
  <h1>60% opacity</h1>
</div>
<div>
  <h1>opacity 1</h1>
</div>
<p>Result with rgba():</p>
<div class="first">
  <h1>10% opacity</h1>
</div>
<div class="second">
  <h1>30% opacity</h1>
</div>
<div class="third">
  <h1>60% opacity</h1>
</div>
<div>
  <h1>default</h1>
</div>
<p>Notice how the text gets transparent as well as the background color when using the opacity property.</p>

				
			

CSS

				
					div {
 background: rgb(0,10,0); 
}
div.first {
  background: rgba(0, 128, 0, 0.1);
}
div.second {
  background: rgba(0, 128, 0, 0.3);
}
div.third {
  background: rgba(0, 128, 0, 0.6);
}

				
			

Output

Transparent Boxes 2

Result with opacity:

10% opacity
30% opacity
60% opacity
opacity 1

Result with rgba():

10% opacity
30% opacity
60% opacity
default

Notice how the text gets transparent as well as the background color when using the opacity property.


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