如何在AngularJS 1.x的Angular材质中使用我自己的调色板来获取ng-disabled的默认行为？

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/angular-material/1.1.12/angular-material.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular-material/1.1.12/angular-material.min.js"></script>

angular.module('myApp', ['ngMaterial']);

<md-button ng-disabled="isDisabled">Click me</md-button>

angular.module('myApp').config(function($mdThemingProvider) {
  $mdThemingProvider.definePalette('myPalette', {
    '50': 'e3f2fd',
    '100': 'bbdefb',
    '200': '90caf9',
    '300': '64b5f6',
    '400': '42a5f5',
    '500': '2196f3',
    '600': '1e88e5',
    '700': '1976d2',
    '800': '1565c0',
    '900': '0d47a1',
    'A100': '82b1ff',
    'A200': '448aff',
    'A400': '2979ff',
    'A700': '2962ff',
    'contrastDefaultColor': 'light',
    'contrastDarkColors': ['50', '100', '200', '300', '400', 'A100'],
    'contrastLightColors': undefined
  });

  $mdThemingProvider.theme('default')
    .primaryPalette('myPalette');
});

angular.module('myApp').controller('myController', function($scope) {
  $scope.isDisabled = true;
});