How to implement dark mode in ionic with angular

Md Riyazuddin Verified

In this snippet, we will implement dark mode in ionic and angular with the help of some basic steps.

Using Media Queries 
The first way to enable dark mode is by using the CSS media query for the user's preferred color scheme: -
@media (prefers-color-scheme: dark) {
  :root {
    /* dark mode variables go here */
  }
}

Automatically Enable Dark Mode
In JavaScript, the dark class can be added to the <body> by checking if the document matches the media query using matchMedia(). This will enable dark mode to still work based on the user preference: -

// Use matchMedia to check the user preference
const prefersDark = window.matchMedia('(prefers-color-scheme: dark)');

toggleDarkTheme(prefersDark.matches);

// Listen for changes to the prefers-color-scheme media query
prefersDark.addListener((mediaQuery) => toggleDarkTheme(mediaQuery.matches));

// Add or remove the "dark" class based on if the media query matches
function toggleDarkTheme(shouldAdd) {
  document.body.classList.toggle('dark', shouldAdd);
}

Ionic Dark Theme
Ionic has a recommended theme for variables to use in order to get a dark mode based on the device running the app.
/*
 * Dark Colors
 * -------------------------------------------
 */

body.dark {
  --ion-color-primary: #428cff;
  --ion-color-primary-rgb: 66, 140, 255;
  --ion-color-primary-contrast: #ffffff;
  --ion-color-primary-contrast-rgb: 255, 255, 255;
  --ion-color-primary-shade: #3a7be0;
  --ion-color-primary-tint: #5598ff;

  --ion-color-secondary: #50c8ff;
  --ion-color-secondary-rgb: 80, 200, 255;
  --ion-color-secondary-contrast: #ffffff;
  --ion-color-secondary-contrast-rgb: 255, 255, 255;
  --ion-color-secondary-shade: #46b0e0;
  --ion-color-secondary-tint: #62ceff;

  --ion-color-tertiary: #6a64ff;
  --ion-color-tertiary-rgb: 106, 100, 255;
  --ion-color-tertiary-contrast: #ffffff;
  --ion-color-tertiary-contrast-rgb: 255, 255, 255;
  --ion-color-tertiary-shade: #5d58e0;
  --ion-color-tertiary-tint: #7974ff;

  --ion-color-success: #2fdf75;
  --ion-color-success-rgb: 47, 223, 117;
  --ion-color-success-contrast: #000000;
  --ion-color-success-contrast-rgb: 0, 0, 0;
  --ion-color-success-shade: #29c467;
  --ion-color-success-tint: #44e283;

  --ion-color-warning: #ffd534;
  --ion-color-warning-rgb: 255, 213, 52;
  --ion-color-warning-contrast: #000000;
  --ion-color-warning-contrast-rgb: 0, 0, 0;
  --ion-color-warning-shade: #e0bb2e;
  --ion-color-warning-tint: #ffd948;

  --ion-color-danger: #ff4961;
  --ion-color-danger-rgb: 255, 73, 97;
  --ion-color-danger-contrast: #ffffff;
  --ion-color-danger-contrast-rgb: 255, 255, 255;
  --ion-color-danger-shade: #e04055;
  --ion-color-danger-tint: #ff5b71;

  --ion-color-dark: #f4f5f8;
  --ion-color-dark-rgb: 244, 245, 248;
  --ion-color-dark-contrast: #000000;
  --ion-color-dark-contrast-rgb: 0, 0, 0;
  --ion-color-dark-shade: #d7d8da;
  --ion-color-dark-tint: #f5f6f9;

  --ion-color-medium: #989aa2;
  --ion-color-medium-rgb: 152, 154, 162;
  --ion-color-medium-contrast: #000000;
  --ion-color-medium-contrast-rgb: 0, 0, 0;
  --ion-color-medium-shade: #86888f;
  --ion-color-medium-tint: #a2a4ab;

  --ion-color-light: #222428;
  --ion-color-light-rgb: 34, 36, 40;
  --ion-color-light-contrast: #ffffff;
  --ion-color-light-contrast-rgb: 255, 255, 255;
  --ion-color-light-shade: #1e2023;
  --ion-color-light-tint: #383a3e;
}

/*
 * iOS Dark Theme
 * -------------------------------------------
 */
.ios body.dark {
  --ion-background-color: #000000;
  --ion-background-color-rgb: 0, 0, 0;

  --ion-text-color: #ffffff;
  --ion-text-color-rgb: 255, 255, 255;

  --ion-color-step-50: #0d0d0d;
  --ion-color-step-100: #1a1a1a;
  --ion-color-step-150: #262626;
  --ion-color-step-200: #333333;
  --ion-color-step-250: #404040;
  --ion-color-step-300: #4d4d4d;
  --ion-color-step-350: #595959;
  --ion-color-step-400: #666666;
  --ion-color-step-450: #737373;
  --ion-color-step-500: #808080;
  --ion-color-step-550: #8c8c8c;
  --ion-color-step-600: #999999;
  --ion-color-step-650: #a6a6a6;
  --ion-color-step-700: #b3b3b3;
  --ion-color-step-750: #bfbfbf;
  --ion-color-step-800: #cccccc;
  --ion-color-step-850: #d9d9d9;
  --ion-color-step-900: #e6e6e6;
  --ion-color-step-950: #f2f2f2;

  --ion-item-background: #000000;

  --ion-card-background: #1c1c1d;
}

.ios body.dark ion-modal {
  --ion-background-color: var(--ion-color-step-100);
  --ion-toolbar-background: var(--ion-color-step-150);
  --ion-toolbar-border-color: var(--ion-color-step-250);
  --ion-item-background: var(--ion-color-step-150);
}

/*
 * Material Design Dark Theme
 * -------------------------------------------
 */

.md body.dark {
  --ion-background-color: #121212;
  --ion-background-color-rgb: 18, 18, 18;

  --ion-text-color: #ffffff;
  --ion-text-color-rgb: 255, 255, 255;

  --ion-border-color: #222222;

  --ion-color-step-50: #1e1e1e;
  --ion-color-step-100: #2a2a2a;
  --ion-color-step-150: #363636;
  --ion-color-step-200: #414141;
  --ion-color-step-250: #4d4d4d;
  --ion-color-step-300: #595959;
  --ion-color-step-350: #656565;
  --ion-color-step-400: #717171;
  --ion-color-step-450: #7d7d7d;
  --ion-color-step-500: #898989;
  --ion-color-step-550: #949494;
  --ion-color-step-600: #a0a0a0;
  --ion-color-step-650: #acacac;
  --ion-color-step-700: #b8b8b8;
  --ion-color-step-750: #c4c4c4;
  --ion-color-step-800: #d0d0d0;
  --ion-color-step-850: #dbdbdb;
  --ion-color-step-900: #e7e7e7;
  --ion-color-step-950: #f3f3f3;

  --ion-item-background: #1e1e1e;

  --ion-toolbar-background: #1f1f1f;

  --ion-tab-bar-background: #1f1f1f;

  --ion-card-background: #1e1e1e;
}