SVG background image CSS
SVG Background Image CSS
SVG (Scalable Vector Graphics) is an XML format used to define graphics. It can be directly parsed by browsers and has the same basic features as HTML, such as the ability to style SVG graphics using CSS. In web development, we often use SVG to draw vector graphics, and using SVG as a background image is a common application. This article will discuss in detail how to use SVG as a background image and control its styling with CSS.
What is an SVG background image?
SVG background https://coder-cafe.com/wp-content/uploads/2025/09/images are SVG graphics that appear as the background of a web page element, rather than being inserted directly into the page as a standalone element. By using SVG as a background image, we can achieve more flexible and diverse effects, and control its size, position, color, and other properties with CSS.
How to use SVG background image?
Using SVG as a background image in HTML is similar to using a regular image, with two main methods: inline SVG and external SVG files.
Inline SVG
Inline SVG is a method of inserting SVG code directly into an HTML file. You can insert SVG code into an HTML file using the <svg> tags. For example, here’s a simple inline SVG code example:
<div class="svg-bg"></div>
<style>
.svg-bg {
width: 200px;
height: 200px;
background: url("data:image/svg+xml;utf8,<svg viewBox='0 0 200 200'><circle cx='100' cy='100' r='50' fill='red'/></svg>");
}
</style>
In the code above, we define a red circle with a radius of 50 using the <svg> tag and apply it as the background image to a <div> element. By setting the background attribute to url("data:image/svg+xml;utf8,..."), we can display the inline SVG code as the background image.
External SVG File
External SVG files store the SVG code in a separate SVG file and reference it using the url() function as the background image. The following is an example of an external SVG file:
<div class="svg-bg"></div>
<style>
.svg-bg {
width: 200px;
height: 200px;
background: url("circle.svg");
}
</style>
In the above example, circle.svg is an SVG file containing a circle. By applying it as the background image to the <div> element, the same effect is achieved.
CSS Styling
CSS allows you to easily control the style of SVG background https://coder-cafe.com/wp-content/uploads/2025/09/images, including attributes such as size, position, and fill color. Below we will detail some common CSS styling methods.
Size Control
The background image size can be set using the background-size property. You can use pixel values, percentages, cover, and contain values to control the background image size. For example, the following code sets the background image size to 100px * 100px:
.svg-bg {
width: 100px;
height: 100px;
background-size: 100px 100px;
}
Position Control
The background image’s position can be set using the background-position property. You can use values such as pixels and percentages to control the background image’s position. For example, the following code sets the background image’s position to the bottom right corner:
.svg-bg {
background-position: right bottom;
}
Fill Color Control
The background-color property allows you to set the background image’s fill color. You can use color values, RGBA values, and other parameters to set the fill color. If an SVG graphic has transparent areas, setting the fill color will allow them to show through. For example, the following code sets the fill color to blue:
.svg-bg {
background-color: blue;
}
Summary
Through this article, we’ve learned what SVG background https://coder-cafe.com/wp-content/uploads/2025/09/images are, how to use them as background https://coder-cafe.com/wp-content/uploads/2025/09/images in web development, and how to control their styles with CSS. Using SVG background https://coder-cafe.com/wp-content/uploads/2025/09/images can achieve more flexible and diverse effects, making web design more colorful.