PieChartData incorrect center color for one PieChartSectionData with opacity color in sections

[makruhz]

Describe the bug
The center of the pie chart has an incorrect color when it has one PieChartSectionData in the sections parameter and the PieChartSectionData color has opacity

To Reproduce

import 'package:collection/collection.dart';
import 'package:fl_chart/fl_chart.dart';
import 'package:flutter/material.dart';

void main() => runApp(const FlChartPieCharts());

class FlChartPieCharts extends StatelessWidget {
  const FlChartPieCharts({super.key});

  static const List<double> pieChartData1 = [1];
  static const List<double> pieChartData2 = [0.5, 0.5];

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      title: 'FL Chart Pie Charts',
      home: Scaffold(
        body: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            TestPieChart(pieChartData: pieChartData1),
            SizedBox(height: 32),
            TestPieChart(pieChartData: pieChartData2)
          ],
        ),
      ),
    );
  }
}

class TestPieChart extends StatefulWidget {
  const TestPieChart({super.key, required this.pieChartData});

  final List<double> pieChartData;

  @override
  State<TestPieChart> createState() => _TestPieChartState();
}

class _TestPieChartState extends State<TestPieChart> {
  int touchedIndex = -1;

  @override
  Widget build(BuildContext context) {
    return AspectRatio(
      aspectRatio: 2,
      child: PieChart(
        PieChartData(
          centerSpaceColor: Colors.white,
          pieTouchData: PieTouchData(
            touchCallback: (FlTouchEvent event, pieTouchResponse) {
              setState(() {
                if (pieTouchResponse == null || pieTouchResponse.touchedSection == null) {
                  return;
                }
                touchedIndex = pieTouchResponse.touchedSection!.touchedSectionIndex;
              });
            },
          ),
          sections: [
            ...widget.pieChartData.mapIndexed(
              (index, data) => PieChartSectionData(
                value: data,
                radius: 32,
                color: touchedIndex == index ? Colors.green : Colors.green.withOpacity(0.5),
              ),
            ),
          ],
        ),
      ),
    );
  }
}

Screenshots

Versions

• which version of the Flutter are you using?
  3.22.3
• which version of the FlChart are you using? fl_chart:
  0.68.0

[RafaRuiz]

0.65.0 ✅

0.66.0 ❌ (and until last one)