Amazon WorkDocs now supports the ability to change the color theme (Light or Dark) directly in the WorkDocs iOS app. With this release, you are provided full control to manage the WorkDocs specific color theme within your WorkDocs iOS setting menu independently from your device’s system wide light or dark appearance setting. By default, the Amazon WorkDocs iOS app will follow you device’s appearance; however, at any time you can override your Amazon WorkDocs application appearance by setting the theme to Light or Dark in the settings. See the user guide for specific details.
Source:: Amazon AWS