The themes settings are now moved into their own sidebar item. Aside from that the updates proposed for themes are largely UI-focused.
Preset themes
By default, the Denim theme is selected. Custom themes are accessible by clicking the ‘create a custom theme' button.
Custom themes
Once users click ‘create a custom theme’, the settings switch to custom mode (below). To get back to the preset themes, users can click on ‘choose a preset theme’. This will switch back to preset mode (above).
There are further plans to greatly simplify the theme color choices users can select here, but that will be a separate effort from the scope of this project.
Apply theme color choices to all my teams
No changes proposed to how this behaves.