init

lib/utils/color.dart

@@ -0,0 +1,25 @@
+import 'dart:ui';
+import 'package:flutter/material.dart';
+
+//调用的时候需要把hex改一下，比如#223344 needs change to 0xFF223344
+//即把#换成0xFF即可
+
+MaterialColor createMaterialColor(Color color) {
+  List strengths = <double>[.05];
+  Map swatch = <int, Color>{};
+  final int r = color.red, g = color.green, b = color.blue;
+
+  for (int i = 1; i < 10; i++) {
+    strengths.add(0.1 * i);
+  }
+  strengths.forEach((strength) {
+    final double ds = 0.5 - strength;
+    swatch[(strength * 1000).round()] = Color.fromRGBO(
+      r + ((ds < 0 ? r : (255 - r)) * ds).round(),
+      g + ((ds < 0 ? g : (255 - g)) * ds).round(),
+      b + ((ds < 0 ? b : (255 - b)) * ds).round(),
+      1,
+    );
+  });
+  return MaterialColor(color.value, swatch);
+}