The Dark Theme was introduced in GBC version 4.01.20. With the timing of that just before the release of Genero 5.00, your upgrade to Genero 5 is a good time to investigate incorporating the use of a Dark Theme within your Genero application.
I will leave it to the documentation as to how to implement and choose a Dark Theme. In this article I will answer the two most common questions I’d expect we would get asked, that is how to create your own dark theme as part of your customisation, and also why a widget might not change appearance with a dark theme.
Read more at
https://4js.com/ask-reuben/ig-224/