Create CSS Background Similar to One Image: A Step-by-Step Guide

Are you tired of using the same old boring backgrounds on your website? Do you want to add some visual flair to your design? Look no further! In this article, we’ll show you how to create a CSS background similar to one image, and take your website’s design to the next level.

What You’ll Need

To follow along with this tutorial, you’ll need the following:

• A basic understanding of HTML and CSS
• A code editor or IDE (such as Visual Studio Code or Sublime Text)
• The image you want to recreate as a CSS background

Understanding the Image

Before we dive into the code, let’s take a closer look at the image we want to recreate as a CSS background. For this example, we’ll use the following image:

Take note of the following features of the image:

• The background is a gradient that transitions from a light blue to a dark blue
• There are small, white, rounded rectangles scattered throughout the background
• The rectangles are randomly positioned and have slightly varying sizes

Breaking Down the CSS

To recreate this image as a CSS background, we’ll need to break it down into its individual components. We’ll start with the gradient, and then move on to the rectangles.

The Gradient

To create the gradient, we’ll use the CSS `linear-gradient` function. This function takes four arguments: the direction of the gradient, the starting color, the middle color, and the ending color.

.background {
  background-image: linear-gradient(to bottom, #87ceeb, #4682b4);
}

In this example, we’re creating a gradient that transitions from `#87ceeb` (a light blue) to `#4682b4` (a dark blue) from top to bottom.

The Rectangles

To create the rectangles, we’ll use the CSS `radial-gradient` function in conjunction with the `background-size` and `background-position` properties. This will allow us to create small, rounded rectangles that are randomly positioned throughout the background.

.background {
  background-image:
    radial-gradient(farthest-corner at 50% 50%, #ffffff, rgba(255, 255, 255, 0)),
    linear-gradient(to bottom, #87ceeb, #4682b4);
  background-size: 20px 20px;
  background-position: 0px 0px, 40px 40px, 80px 80px, 120px 120px, 160px 160px, 200px 200px;
}

In this example, we’re creating multiple radial gradients that serve as the rectangles. The `farthest-corner at 50% 50%` argument specifies the center of the gradient, and the `#ffffff` and `rgba(255, 255, 255, 0)` arguments specify the starting and ending colors of the gradient, respectively.

The `background-size` property is set to `20px 20px` to specify the size of each rectangle. The `background-position` property is set to a series of values that specify the position of each rectangle.

Adding Randomness to the Rectangles

To add randomness to the rectangles, we’ll use CSS variables and a bit of JavaScript. We’ll create a CSS variable to store the position of each rectangle, and then use JavaScript to generate a random value for each variable.

.background {
  --rect-1-x: 0px;
  --rect-1-y: 0px;
  --rect-2-x: 40px;
  --rect-2-y: 40px;
  --rect-3-x: 80px;
  --rect-3-y: 80px;
  /* ... */
  background-position: var(--rect-1-x) var(--rect-1-y), var(--rect-2-x) var(--rect-2-y), var(--rect-3-x) var(--rect-3-y), /* ... */;
}

In this example, we’re creating CSS variables to store the x and y coordinates of each rectangle. We’ll then use JavaScript to generate a random value for each variable.

const rects = document.querySelectorAll('.background');

rects.forEach(rect => {
  for (let i = 1; i <= 10; i++) {
    rect.style.setProperty(`--rect-${i}-x`, `${Math.floor(Math.random() * 200)}px`);
    rect.style.setProperty(`--rect-${i}-y`, `${Math.floor(Math.random() * 200)}px`);
  }
});

This code selects all elements with the class `background`, and then loops through each element, generating a random x and y coordinate for each rectangle.

Putting it All Together

Now that we have our CSS and JavaScript in place, let's put it all together. Here's the final code:

<div class="background"></div>

.background {
  background-image:
    radial-gradient(farthest-corner at 50% 50%, #ffffff, rgba(255, 255, 255, 0)),
    linear-gradient(to bottom, #87ceeb, #4682b4);
  background-size: 20px 20px;
  background-position: var(--rect-1-x) var(--rect-1-y), var(--rect-2-x) var(--rect-2-y), var(--rect-3-x) var(--rect-3-y), /* ... */;
  --rect-1-x: 0px;
  --rect-1-y: 0px;
  --rect-2-x: 40px;
  --rect-2-y: 40px;
  --rect-3-x: 80px;
  --rect-3-y: 80px;
  /* ... */
}

const rects = document.querySelectorAll('.background');

rects.forEach(rect => {
  for (let i = 1; i <= 10; i++) {
    rect.style.setProperty(`--rect-${i}-x`, `${Math.floor(Math.random() * 200)}px`);
    rect.style.setProperty(`--rect-${i}-y`, `${Math.floor(Math.random() * 200)}px`);
  }
});

This code creates a CSS background similar to the original image, complete with a gradient and randomly positioned rectangles.

Conclusion

In this article, we've shown you how to create a CSS background similar to one image. We've broken down the image into its individual components, and used CSS and JavaScript to recreate each component. By following these steps, you can create a unique and visually appealing background for your website.

Component	CSS Property
Gradient	linear-gradient
Rectangles	radial-gradient, background-size, background-position
Randomness	CSS variables, JavaScript

We hope this article has been helpful in showing you how to create a CSS background similar to one image. Happy coding!

1. Try experimenting with different gradient directions and colors to create a unique background.
2. Use different shapes and sizes for the rectangles to add more visual interest.
3. Experiment with different JavaScript animations to add motion to the rectangles.

Remember to share your creations with us on social media, and don't hesitate to reach out if you have any questions or need further assistance.

Thanks for reading, and happy coding!

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Get ready to dive into the world of CSS backgrounds and learn how to recreate an image using mere code!