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Create Gradient Text Colour in Flutter

Updated: Nov 27, 2022

The Text widget is one of the most common widgets in the Flutter framework that is used to display text elements in form of headings, paragraphs, etc.


In this tutorial, we are going to learn how to create a Text widget with gradient colours in Flutter. The text with gradient colour has multiple background colours.






Step 1: Define the string, Gradient and TextStyle inside a Stateless class as we can reuse it as new widget

class GradientText extends StatelessWidget {
  const GradientText({
    Key? key,
    required this.text,
    this.style,
    required this.gradient,
  }) : super(key: key);
  final String text;
  final TextStyle? style;
  final Gradient gradient;
  @override
  Widget build(BuildContext context) {
    return Container();
  }
}

Step 2: In the return part, return a ShaderMask widget that masks the gradient as paint to the Text.

 ShaderMask(
  blendMode: BlendMode.srcIn,
  shaderCallback: (bounds) => gradient.createShader(
    Rect.fromLTWH(0, 0, bounds.width, bounds.height),
  ),
  child: Text(text, style: style),
);

We have applied the bounds of the text as boundary for the shader and used the blendMode srcIn as our BlendMode.



Here is the Full code.

class GradientText extends StatelessWidget {
  const GradientText({
    Key? key,
    required this.text,
    this.style,
    required this.gradient,
  }) : super(key: key);
  final String text;
  final TextStyle? style;
  final Gradient gradient;
  @override
  Widget build(BuildContext context) {
    return ShaderMask(
      blendMode: BlendMode.srcIn,
      shaderCallback: (bounds) => gradient.createShader(
        Rect.fromLTWH(0, 0, bounds.width, bounds.height),
      ),
      child: Text(text, style: style),
    );
  }
}

Usage

Now we can use it as follows:

Column(
  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
  children: [
    GradientText(
      text: "Welcome",
      gradient: LinearGradient(colors: [
        Colors.green.shade300,
        Colors.blue.shade700,
      ]),
      style: const TextStyle(fontSize: 32.0),
    ),
    GradientText(
      text: "To",
      gradient: LinearGradient(colors: [
        Colors.red.shade300,
        Colors.purple.shade700,
      ]),
      style: const TextStyle(fontSize: 32.0),
    ),
    GradientText(
      text: "AllAboutFlutter",
      gradient: LinearGradient(colors: [
        Colors.purple,
        Colors.red.shade700,
      ]),
      style: const TextStyle(fontSize: 32.0),
    )
  ],
)

Output



Here is the Full code.

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'AllAboutFlutter',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      debugShowCheckedModeBanner: false,
      home: const GradientTextTutorial(),
    );
  }
}

class GradientTextTutorial extends StatefulWidget {
  const GradientTextTutorial({Key? key}) : super(key: key);

  @override
  State<GradientTextTutorial> createState() => _GradientTextTutorialState();
}

class _GradientTextTutorialState extends State<GradientTextTutorial> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Gradient Text Tutorial'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
          children: [
            GradientText(
              text: "Welcome",
              gradient: LinearGradient(colors: [
                Colors.green.shade300,
                Colors.blue.shade700,
              ]),
              style: const TextStyle(fontSize: 32.0),
            ),
            GradientText(
              text: "To",
              gradient: LinearGradient(colors: [
                Colors.red.shade300,
                Colors.purple.shade700,
              ]),
              style: const TextStyle(fontSize: 32.0),
            ),
            GradientText(
              text: "AllAboutFlutter",
              gradient: LinearGradient(colors: [
                Colors.purple,
                Colors.red.shade700,
              ]),
              style: const TextStyle(fontSize: 32.0),
            )
          ],
        ),
      ),
    );
  }
}

class GradientText extends StatelessWidget {
  const GradientText({
    Key? key,
    required this.text,
    this.style,
    required this.gradient,
  }) : super(key: key);
  final String text;
  final TextStyle? style;
  final Gradient gradient;
  @override
  Widget build(BuildContext context) {
    return ShaderMask(
      blendMode: BlendMode.srcIn,
      shaderCallback: (bounds) => gradient.createShader(
        Rect.fromLTWH(0, 0, bounds.width, bounds.height),
      ),
      child: Text(text, style: style),
    );
  }
}

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