Flutter does not accept Color const-CodePudding

i created a file with the colors that i want to use in my project, but when i try to used, flutter does not acept the variables as a correct color.

This is the colors file:

import 'package:flutter/material.dart';

class ColorSkh {
     static Color innovation = const Color.fromARGB(255, 59, 18, 45);
     static Color fresh = const Color.fromARGB(255, 172, 155, 163);
     static Color hightech = const Color.fromARGB(255, 0, 128, 157);
     static Color sophisticated = const Color.fromARGB(255, 230, 231, 232);
     static Color sk = const Color.fromARGB(255, 191, 205, 217);
     static Color white = const Color.fromARGB(255, 255, 255, 255);
}

And this is how i am using it



import 'package:analytic_skh/ui/color_skh.dart';
.
.
.


SizedBox(
                *height: height * 0.10,
                child: Align(
                    alignment: Alignment.centerLeft,
                    child: ElevatedButton.icon(
                      onPressed: onPressed,
                      icon: const Icon(Icons.settings),
                      label: const Text('Settings',
                          style:
                              TextStyle(backgroundColor: ColorSkh.innovation)),
                      style: ElevatedButton.styleFrom(
                        backgroundColor: Colors.white,
                      ),
                    )),
              )*

but i get the error that this is a invalid constant

CodePudding user response：

Change your static colors to the const like below.

class ColorSkh {
  static const Color innovation = Color.fromARGB(255, 59, 18, 45);
  static const Color fresh = Color.fromARGB(255, 172, 155, 163);
  static const Color hightech = Color.fromARGB(255, 0, 128, 157);
  static const Color sophisticated = Color.fromARGB(255, 230, 231, 232);
  static const Color sk = Color.fromARGB(255, 191, 205, 217);
  static const Color white = Color.fromARGB(255, 255, 255, 255);
}

CodePudding user response：

You need to remove the color from the Text widget since it ca be constant anymore because those color variables are static and not final, so try this:

SizedBox(
            *height: height * 0.10,
            child: Align(
                alignment: Alignment.centerLeft,
                child: ElevatedButton.icon(
                  onPressed: onPressed,
                  icon: const Icon(Icons.settings),
                  label: Text('Settings',
                      style:
                          TextStyle(backgroundColor: ColorSkh.innovation)),
                  style: ElevatedButton.styleFrom(
                    backgroundColor: Colors.white,
                  ),
                )),
          )*