I am trying to make a dark theme for pharo. So I was studying the subclasses of UITheme class. As a first step I want to darken the color of the windows , so I used newDefaultSettings class method to change the color, and I saw no effect. I also even tried to use the right arrow drop down menu that has an entry with window color and still I see no effect. Is this a bug ? I think I remember this used to work in Pharo 3. I am on Pharo 3 and using image 30753 which I fetched today with PharoLauncher. I would like to also ask if there is any documentation of themes and morphic around to help me customize the look its something really crucial for my project Ephestos and I would hate having to recreate Morphic from scratch to do this. Because as it is I find it very hard to understand the methods of UITheme.