Button component bg/color parameters cause invalid_constant error blocking build

[PlateBrain74]

Can we access your project?

• I give permission for members of the FlutterFlow team to access and test my project for the sole purpose of investigating this issue.

Current Behavior

W polu Current Behavior wpisz:

`The Button component has two parameters (bg and color) with Color type. FlutterFlow generates default values using FlutterFlowTheme.of(context) in the const constructor, which causes these errors in the Dart analyzer:

• invalid_constant: Invalid constant value (lines 345, 400)
• undefined_identifier: Undefined name 'context' (lines 365, 420)

This completely blocks Test Mode and APK builds. The bug exists since the beginning of the project and is present in all project backups.

Expected Behavior

The Button component should build without errors. Default Color parameter values should not use FlutterFlowTheme.of(context) in the const constructor, as this is not valid Dart. FlutterFlow should either use a const Color as default, or not generate a default value at all.

`Additionally, the component cannot be deleted and replaced because FlutterFlow does not allow deleting components that are in use on pages.

Steps to Reproduce

1. Create a Component with a Color parameter named "bg" or "color"
2. Set the Default Value to FlutterFlowTheme.of(context).primary (or any theme color)
3. Save the component
4. Attempt to build the project or run Test Mode
5. Observe build errors: "invalid_constant" and "undefined name 'context'" in button_widget.dart

Reproducible from Blank

• The steps to reproduce above start from a blank project.

Bug Report Code (Required)

IT4siMn1z892pbxZ15D+acFr/GAsJlA7auc4scl8bw4bF5joPLMQesnQTFRuOde0TFY3IlmY8HEexvfqv/LxVvUqYDmsGr58z7VTWgv/fDiiSpebELrsfW1fGdxTG0CO1pm7niRROsx1L11nw2a6HeyRa3PaCZzrO1cZDcqLJdeK2SrDX1iXc2URm05KZDPz

Visual documentation

Environment

- FlutterFlow version: latest (web)
- Platform:Web
- Browser name and version:Microsoft Edge (latest)
- Operating system and version affected: Windows 11

Additional Information

This bug has been present since the beginning of the project. I confirmed it exists in project backups from 05/05/2026. The bug cannot be fixed through the UI because default values revert automatically. The component cannot be deleted and replaced because FlutterFlow does not allow deleting components that are in use on pages. This is blocking my app from reaching the App Store before my planned launch date.

[Juansarmi]

Hi! I'm sorry you're experiencing this issue.

I can see that you're trying to run your app while there are currently five errors in your project. FlutterFlow is indicating exactly what those errors are, and they need to be resolved before the app can run successfully.

You can either add the required parameters as recommended by FlutterFlow, or remove the components that are causing the errors (making sure to remove them from any pages where they're currently being used first). After that, you can recreate those components if needed.

Please let me know how it goes once you've resolved those errors. I'll be happy to help further if you're still running into issues.

Best regards!

[PlateBrain74]

Hi Juansarmi,

Thank you for your response, but I want to clarify that this is not a user configuration issue — this is a bug in FlutterFlow's code generator.

The Button component has two Color parameters (bg and color) with default values set to FlutterFlowTheme.of(context).primary. FlutterFlow is automatically generating these default values inside a const constructor in button_widget.dart, which is invalid Dart — you cannot call FlutterFlowTheme.of(context) inside a const constructor because context is not available there.

The errors are:

• invalid_constant: Invalid constant value (lines 345, 400)
• undefined_identifier: Undefined name 'context' (lines 365, 420)

I did not write this code — FlutterFlow generated it automatically. I cannot fix this from the UI because:

• Removing the default values reverts on exit
• Changing the parameter type to String crashes the layout
• Entering a hex value (#E8B84B) as default value auto-resets to the theme color

This bug is blocking Test Mode and build entirely. Please escalate this to your engineering team as it appears to be a code generation bug affecting Color parameters with theme default values in components.

Thank you.

[Juansarmi]

Hi! Sorry to hear you're experiencing this issue.

Unfortunately, I'm not able to reproduce the error on my end. It might be something specific to your project.

In this case, I recommend reaching out to support via the in-app chat or by email at support@flutterflow.io . They have the tools and access needed to take a closer look at your specific case. They have the tools and access needed to investigate and resolve the issue in your specific case.
Best regards.