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Change QR Code Color with C# REST API

This tutorial shows you how to change QR code color with the C# REST API. Using the Aspose.BarCode Cloud SDK for .NET, you’ll build a colored QR code generator and explore every parameter that customizes the QR code image (PNG).

Prerequisite

Steps to Change Color of QR Code with C# Low Code API

  1. Include the Aspose.BarCode Cloud SDK API and Model namespaces to access barcode generation classes
  2. Create a Configuration object and set the API base URL, client ID, and client secret for authentication with Aspose Cloud
  3. Specify the name of the output image file where the generated QR code will be saved
  4. Create a GenerateApi object using the configuration to enable barcode generation
  5. Call the GenerateAsync() method with parameters such as barcode type, input text, image format, and custom foreground/background colors
  6. Create a file stream with the specified file name and copy the generated QR code data into it

These steps summarize how to create a colored QR code with C# RESTful Service. First, connect to Aspose.BarCode Cloud by providing your credentials and setting up the API, then generating a QR code with your chosen text, colors, and image format. Finally, save the QR code to a file on the computer.

Code to Create Colored QR Code with C# .NET-based API

With this example you can effortlessly set a custom QR‑code background color using the C# REST API. By issuing a GET request that includes the barcode type, the text to encode, the desired colors, size and rotation, the service returns the QR‑code image as a stream—ready to be saved or embedded directly into your application.

Now you’ve learned how to create a QR code in any color you like. If you first need a simple black‑and‑white QR, see our guide on Generate QR with C# REST API.

 

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