How do I set the animation color of a LinearProgressIndicator?

The [LinearProgressIndicator documentation][1] helpfully displays the existence of a valueColor property and even mentions "To specify a constant color use: new AlwaysStoppedAnimation<Color>(color).", but if I try to set the color I get an error that LinearProgressIndicator has no instance setter for valueColor and the constructor for the class only accepts a key and a numerical value for the progress amount.

If I want a LinearProgressIndicator with a custom color do I need to create my own class? Is there really no way to specify this?

[1]:

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Looks like it's controlled from the Theme's accent color:

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Wrap the relevant subtree in a modified Theme setting the accentColor to whatever you might like.

I think you can provide in the below way,

LinearProgressIndicator( valueColor: AlwaysStoppedAnimation<Color> (Color(0xFFA86E52)),),

If you want to set a constant color you can use :

```dart
CircularProgressIndicator(
valueColor: AlwaysStoppedAnimation<Color>(Colors.white),
)
```

```dart
LinearProgressIndicator(
backgroundColor: Color(0xFFB4B4B4),
valueColor: AlwaysStoppedAnimation<Color>(Colors.green),
)
```

LinearProgressIndicator(
backgroundColor: Colors.black,
valueColor: AlwaysStoppedAnimation<Color>(Colors.yellow) ,
color: Colors.red,
minHeight: 10,
),