src/theme/variables.scss
// Ionic Variables and Theming. For more info, please see:
// http://ionicframework.com/docs/theming/

// Font path is used to include ionicons,
// roboto, and noto sans fonts
$font-path: "../assets/fonts";


// The app direction is used to include
// rtl styles in your app. For more info, please see:
// http://ionicframework.com/docs/theming/rtl-support/
$app-direction: ltr;


@import "ionic.globals";


// Shared Variables
// --------------------------------------------------
// To customize the look and feel of this app, you can override
// the Sass variables found in Ionic's source scss files.
// To view all the possible Ionic variables, see:
// http://ionicframework.com/docs/theming/overriding-ionic-variables/




// Named Color Variables
// --------------------------------------------------
// Named colors makes it easy to reuse colors on various components.
// It's highly recommended to change the default colors
// to match your app's branding. Ionic uses a Sass map of
// colors so you can add, rename and remove colors as needed.
// The "primary" color is the only required color in the map.

$colors: (
  //primary:    #488aff,
  //secondary:  #32db64,
  //danger:     #f53d3d,
  //light:      #f4f4f4,
  //dark:       #222

  primary: #488aff,
  secondary: #343434,
  // secondary:  #32db64,
  danger: #f53d3d,
  light: #f4f4f4,
  dark: #222,
  custom:(
    base: #55acee,
    /*元素的背景色*/
    contrast: #6633FF
    /*文本颜色*/
  )
);


// App iOS Variables
// --------------------------------------------------
// iOS only Sass variables can go here




// App Material Design Variables
// --------------------------------------------------
// Material Design only Sass variables can go here




// App Windows Variables
// --------------------------------------------------
// Windows only Sass variables can go here




// App Theme
// --------------------------------------------------
// Ionic apps can have different themes applied, which can
// then be future customized. This import comes last
// so that the above variables are used and Ionic's
// default are overridden.

@import "ionic.theme.default";


// Ionicons
// --------------------------------------------------
// The premium icon font for Ionic. For more info, please see:
// http://ionicframework.com/docs/ionicons/

@import "ionic.ionicons";


// Fonts
// --------------------------------------------------

@import "roboto";
@import "noto-sans";

@import "theme.light";
@import "theme.dark";

ion-title {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  text-align: center;
}

.back-button.show-back-button {
  z-index: 9999;
  color: white;
}

