Build error in first time using fl_chart

I followed the documentation and this error occurred with me

**To Reproduce**
Run this command:
`flutter pub add fl_char`
And add this in any page "import 'package:fl_chart/fl_chart.dart';", the error is show in debug terminal

**Versions**
- Flutter: ^3.5.3
- fl_chart: ^0.70.2

Error in debug console:

../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/chart/base/axis_chart/axis_chart_data.dart:1470:43: Error: The getter 'a' isn't defined for the class 'Color'.
- 'Color' is from 'dart:ui'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'a'.
if (strokeWidth != 0.0 && strokeColor.a != 0.0) {
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/chart/base/axis_chart/axis_chart_data.dart:1567:43: Error: The getter 'a' isn't defined for the class 'Color'.
- 'Color' is from 'dart:ui'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'a'.
if (strokeWidth != 0.0 && strokeColor.a != 0.0) {
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/chart/line_chart/line_chart_data.dart:550:35: Error: The method 'withValues' isn't defined for the class 'MaterialColor'.
- 'MaterialColor' is from 'package:flutter/src/material/colors.dart' ('../../../../flutter/packages/flutter/lib/src/material/colors.dart').
Try correcting the name to the name of an existing method, or defining a method named 'withValues'.
? Colors.blueGrey.withValues(alpha: 0.5)
^^^^^^^^^^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/chart/line_chart/line_chart_data.dart:606:35: Error: The method 'withValues' isn't defined for the class 'MaterialColor'.
- 'MaterialColor' is from 'package:flutter/src/material/colors.dart' ('../../../../flutter/packages/flutter/lib/src/material/colors.dart').
Try correcting the name to the name of an existing method, or defining a method named 'withValues'.
? Colors.blueGrey.withValues(alpha: 0.5)
^^^^^^^^^^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/chart/radar_chart/radar_chart_data.dart:300:46: Error: The method 'withValues' isn't defined for the class 'MaterialColor'.
- 'MaterialColor' is from 'package:flutter/src/material/colors.dart' ('../../../../flutter/packages/flutter/lib/src/material/colors.dart').
Try correcting the name to the name of an existing method, or defining a method named 'withValues'.
fillColor = fillColor ?? Colors.cyan.withValues(alpha: 0.2),
^^^^^^^^^^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/extensions/color_extension.dart:9:20: Error: The getter 'a' isn't defined for the class 'Color'.
- 'Color' is from 'dart:ui'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'a'.
_floatToInt8(a),
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/extensions/color_extension.dart:10:21: Error: The getter 'r' isn't defined for the class 'Color'.
- 'Color' is from 'dart:ui'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'r'.
(_floatToInt8(r) * value).round(),
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/extensions/color_extension.dart:11:21: Error: The getter 'g' isn't defined for the class 'Color'.
- 'Color' is from 'dart:ui'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'g'.
(_floatToInt8(g) * value).round(),
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/extensions/color_extension.dart:12:21: Error: The getter 'b' isn't defined for the class 'Color'.
- 'Color' is from 'dart:ui'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'b'.
(_floatToInt8(b) * value).round(),
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/chart/base/axis_chart/axis_chart_painter.dart:159:30: Error: The getter 'a' isn't defined for the class 'Color'.
- 'Color' is from 'dart:ui'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'a'.
if (data.backgroundColor.a == 0.0) {
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/extensions/border_extension.dart:12:20: Error: The getter 'a' isn't defined for the class 'Color'.
- 'Color' is from 'dart:ui'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'a'.
if (left.color.a == 0.0 &&
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/extensions/border_extension.dart:13:19: Error: The getter 'a' isn't defined for the class 'Color'.
- 'Color' is from 'dart:ui'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'a'.
top.color.a == 0.0 &&
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/extensions/border_extension.dart:14:21: Error: The getter 'a' isn't defined for the class 'Color'.
- 'Color' is from 'dart:ui'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'a'.
right.color.a == 0.0 &&
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/extensions/border_extension.dart:15:22: Error: The getter 'a' isn't defined for the class 'Color'.
- 'Color' is from 'dart:ui'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'a'.
bottom.color.a == 0.0) {
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/chart/bar_chart/bar_chart_painter.dart:339:56: Error: The getter 'a' isn't defined for the class 'Color'.
- 'Color' is from 'dart:ui'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'a'.
if (borderSide.width > 0 && borderSide.color.a > 0) {
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/chart/bar_chart/bar_chart_painter.dart:637:71: Error: The getter 'a' isn't defined for the class 'Color'.
- 'Color' is from 'dart:ui'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'a'.
if (stackItem.borderSide.width == 0 || stackItem.borderSide.color.a == 0) {
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/chart/line_chart/line_chart_painter.dart:1001:47: Error: The getter 'a' isn't defined for the class 'Color'.
- 'Color' is from 'dart:ui'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'a'.
if (!barData.show || barData.shadow.color.a == 0.0) {
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/extensions/paint_extension.dart:8:21: Error: The method 'withValues' isn't defined for the class 'Color'.
- 'Color' is from 'dart:ui'.
Try correcting the name to the name of an existing method, or defining a method named 'withValues'.
color = color.withValues(alpha: 0);
^^^^^^^^^^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/chart/pie_chart/pie_chart_painter.dart:146:38: Error: The getter 'a' isn't defined for the class 'Color'.
- 'Color' is from 'dart:ui'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'a'.
section.borderSide.color.a != 0.0) {
^
../../../../AppData/Local/Pub/Cache/hosted/pub.dev/fl_chart-0.70.2/lib/src/chart/pie_chart/pie_chart_painter.dart:332:69: Error: The getter 'a' isn't defined for the class 'Color'.
- 'Color' is from 'dart:ui'.
Try correcting the name to the name of an existing getter, or defining a getter or field named 'a'.
if (section.borderSide.width != 0.0 && section.borderSide.color.a != 0.0) {
^
Target kernel_snapshot_program failed: Exception

Reproduce the build with Flutter 3.5.3 and fl_chart 0.70.2, then inspect the reported files under lib/src/chart and lib/src/extensions, especially the Color-related errors. The work is done when the package builds successfully in that environment without the reported Color getter and method errors.

Written by the indexing model from the issue text.