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2026-03-195 min read

Text Selection Color (Python Programming)

Learn Text Selection Color (Python Programming) step by step with clear examples and exercises.

Title: Change Text Selection Color in Python Programming (Expanded Version)

Why This Matters

In web development, creating visually appealing interfaces is crucial for engaging users and enhancing their experience. One such aspect is customizing text selection colors to match the overall theme of your website or application. In this lesson, we will learn how to change the text selection color using Python with the help of a popular library called Pyperclip.

By the end of this tutorial, you'll be able to create and apply custom CSS styles for text selection in various web applications. This skill can help you make your websites stand out and provide a more polished user experience.

Prerequisites

To follow along with this tutorial, you should have basic knowledge of Python and be familiar with installing libraries using pip. If you're new to Python, we recommend checking out our Python for Beginners series on XQA. Additionally, a basic understanding of HTML and CSS will help you understand how the custom styles are applied in web browsers.

Core Concept

Pyperclip is a Python library that allows you to copy and paste text between the clipboard and your Python script. It works on Windows, macOS, and Linux. To change the text selection color, we will first need to set up a custom CSS style for the selected text, then use Pyperclip to write this style into the user's system clipboard.

Installing Pyperclip

To install Pyperclip, open your terminal or command prompt and run the following command:

pip install pyperclip

Creating a custom CSS style

Create a new Python script named change_selection_color.py. In this file, we will define our custom CSS style for the selected text.

import os
import pyperclip

Define your desired color as a hex code (e.g., '#FF0000' for red)

color = '#FF0000'

Create a custom CSS style for the selected text

style = f"""

body {{

user-select: text;

-webkit-user-select: text;

}}

body::selection {{

background-color: {color};

border-radius: 4px;

padding: 2px;

}}

"""


Replace the `color` variable with your desired selection color as a hex code. The added CSS properties, such as `border-radius` and `padding`, are optional but can help improve the visual appearance of the selected text.

### Writing the style into the clipboard

Now that we have our custom CSS style, let's use Pyperclip to write it into the user's system clipboard:

Write the style into the clipboard

pyperclip.copy(style)

print("Custom text selection color copied to clipboard!")


### Testing the script

To test the script, save it and run it using Python:

python change_selection_color.py


Now, open a web browser or any text editor, select some text, and paste it. You should see that the selected text now has the color you specified in your script, along with the optional border-radius and padding effects.

Worked Example

Let's walk through an example of changing the text selection color for the word "Python" on a simple HTML page.

  1. Create a new file named index.html and add the following content:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Change Text Selection Color Example</title>
</head>
<body>
<h1>Welcome to Python!</h1>
<p id="python">Python is a popular programming language.</p>
</body>
</html>
  1. Open the HTML file in your web browser and select the word "Python." You will notice that the default selection color is applied.
  1. Run the change_selection_color.py script from earlier to change the text selection color:
python change_selection_color.py
  1. Refresh your web browser, select the word "Python," and you should see that it now has the color specified in the script, along with the optional border-radius and padding effects.

Common Mistakes

  1. Not setting up the custom CSS style correctly: Ensure that the style variable contains valid CSS code for the selected text and that the color is defined as a hex code. Additionally, verify that the CSS properties are formatted correctly and that any optional properties, such as border-radius and padding, are included if desired.
  2. Forgetting to write the style into the clipboard: After defining the style, make sure to call pyperclip.copy(style) to copy it into the user's system clipboard.
  3. Not saving the HTML file with the correct extension: Make sure you save your HTML file as index.html.
  4. Not refreshing the web browser after running the script: After changing the text selection color, remember to refresh the web browser to see the updated style.
  5. Using an unsupported browser or application: Some browsers and applications may not support custom CSS styles for text selection. If you encounter issues with a specific browser or application, consider testing your code in other supported environments.

Practice Questions

  1. Change the text selection color for the word "Python" in the following HTML code:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Change Text Selection Color Example</title>
</head>
<body>
<h1>Welcome to Python!</h1>
<p id="python">Python is a popular programming language.</p>
</body>
</html>

Use the color #FF6347.

  1. Write a script that changes the text selection color for the word "JavaScript" in an HTML file named javascript_example.html. Use the color #00D8FF.
  1. Modify the CSS style in the change_selection_color.py script to include a 6px border-radius and 4px padding for the selected text.

FAQ

  1. What if I want to change the text selection color for multiple words or elements on a page?

You can modify the style variable to include multiple CSS selectors, each with its own custom color. Just make sure that the selectors are separated by commas and enclosed within curly braces. For example:

style = f"""
<style>
{{
body {{
user-select: text;
-webkit-user-select: text;
}}
body::selection {{
background-color: #FF6347;
border-radius: 6px;
padding: 4px;
}}
#python {{
background-color: #00D8FF;
}}
}}
"""
  1. Can I use this technique to change the text selection color in other applications besides web browsers?

It depends on the application and its support for custom styles. This technique works for web browsers because they follow the CSS specifications, but other applications may not support it. For example, some text editors or word processors may have their own methods for changing text selection colors.

  1. Why does my custom text selection color not work when I paste text into some applications or websites?

Some applications and websites may have their own text selection styles that override your custom style. You can try modifying the user-select property in your CSS to see if it works with the specific application or website you are using. For example, you could change the user-select property to:

body {
-webkit-user-select: text; /* for Chrome, Safari, and Opera */
user-select: text; /* for Firefox */
}

This ensures that your custom style will work across multiple browsers.

Text Selection Color (Python Programming) | Python | XQA Learn