Forge

Reactive Application, Dark Theme to Light Theme without loosing it on refresh, we have a theme module that can be used in multiple application by taking dependencies from the theme, Easy to customize according to your color pallets, Turn on Dark Mode for a great viewing experience especially in low-light environments. Dark Mode is a dramatic new look that’s easy on your eyes and helps you focus on the content. It uses a dark color scheme and is activated  with a toggle icon on header.
Sample Screens have created to have a purview.
You can comment for any quarries related to it.

Design OutSystems applications with SAP Fiori look and feel to seamlessly integrate the user experience with already existing SAP web applications.

This component shows you how to put dark mode on your reactive apps.

This component shows you how to put dark mode on your mobile apps.

Mobile Application, Dark Theme to Light Theme without loosing it on refresh, we have a theme module that can be used in multiple application by taking dependencies from the theme, Easy to customize according to your color pallets, Turn on Dark Mode for a great viewing experience especially in low-light environments. Dark Mode is a dramatic new look that’s easy on your eyes and helps you focus on the content. It uses a dark color scheme and is activated  with a toggle icon on header.
Sample Screens have created to have a purview.
You can comment for any quarries related to it.

This app helps developers check if Dark Mode is enabled on device. It's a straightforward plugin that makes it easier to adjust your app designs based on the user's preference.
It is based on 'https://github.com/mariusbackes/cordova-plugin-theme-detection' by Marius Backes.

Dark theme for OutSystems web applications is easy to implement. Simply install the Forge component and add it to your web application. Once added, the dark theme will be available for your users to select.

Toggle between dark and light themes

You can you this to create dark-light effect in your application. In reactive it is very easy to change using script but for traditional it will be very tough to achieve the same to be consistent in your application even after the page is refreshed. This will help you to resolve that issue.