How to Change the Primary Color with Hexadecimal Color in Flutter

Discover an effective method to change the primary color in your Flutter app using hexadecimal values. Follow our easy step-by-step guide for a successful implementation.
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This video is based on the question https://stackoverflow.com/q/70548623/ asked by the user 'AzerSD' ( https://stackoverflow.com/u/12246961/ ) and on the answer https://stackoverflow.com/a/70548699/ provided by the user 'Md. Yeasin Sheikh' ( https://stackoverflow.com/u/10157127/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Change the Primary Color with Hexadecimal Color in Flutter

Flutter is an incredible framework for building beautiful and high-performing mobile applications. However, when it comes to customizing aspects like color schemes, developers might encounter some hurdles. One common issue is how to change the primary color of an app using a hexadecimal color code, especially when custom colors don't seem to apply as expected.

In this guide, we will walk you through the steps to effectively change the primary color using a hexadecimal value in your Flutter app. Let’s dive in!

Understanding the Problem

When trying to set a specific primary color using a hexadecimal value, developers often use the following code snippet:

[[See Video to Reveal this Text or Code Snippet]]

However, this may not work as anticipated. Upon checking the documentation, you might find another method that utilizes the ColorScheme:

[[See Video to Reveal this Text or Code Snippet]]

This can be frustrating, especially when you're focused on achieving that perfect aesthetic for your app. The good news is that there is an effective way to change your primary color without running into these issues.

Step-by-Step Solution

Using Theme CopyWith

To change the primary color to your desired hexadecimal color, you can utilize the copyWith method available in Flutter's theme management. Here’s how to do it:

Define Your Theme: Instead of trying to replace the primary swatch directly, you can copy the current theme and customize it.

Implement the Code: Replace your theme definition with the following code.

Here’s the code snippet to apply:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the Code

Theme.of(context): This allows you to access the current theme's settings from the context.

copyWith(): This method creates a modified copy of the current theme so you can adjust only the aspects you want without affecting the entire theme.

colorScheme.copyWith(): This line specifically targets the color scheme of the theme, allowing changes to be made to the primary color.

Additional Tips

If you are unsure about the hexadecimal value, you can use online color pickers that provide hex codes for colors.

Remember to hot reload your app to see changes immediately after implementing the new color.

Conclusion

Changing the primary color in your Flutter app using hexadecimal colors does not have to be a complicated task. By utilizing Theme.of(context).copyWith() to customize your theme, you can achieve your desired color scheme with ease.

Happy coding, and enjoy crafting visually appealing apps with Flutter!