Right now, in addition to being partially broken, things are nothing short of confusing.
Under “Custom” ETO color settings, there are the holdovers from V7, the same as in Options>Appearance>Colors. I assume one of those two sections will actually disappear at some point.
Most of the UI colors are under the “General” section:
However, some of this stuff is still not ‘granular’ enough to be really good (IMO), and on top of that there is no real explanation of what these colors apply to - the Help topic mentions their existence but does not explain what parts they apply to.
Then in “Advanced” there are myriad other color settings (type “uipaint”), some of which do the same thing as “General” but are named differently, and others that are only accessible through the advanced section.
For example
General>Window Color 1 = UiPaintColors.NormalStart
General>Window Color 2 = UiPaintColors.NormalEnd
General>Window Color 3 = UiPaintColors.HotStart
(UiPaintColors.HotStart did something very minor in V7, doesn’t appear to do anything in the WIP.
I have not been able to determine what UiPaintColors.HotEnd actually does in either, if anything.)
BTW, all of the above should have a “reset to default” option in the Advanced section.
Bad “granularity”:
General>Window Color 2 = UiPaintColors.NormalEnd controls not only the “end” color of the toolbar icons (if you want a “gradient” look), but also the dialog backgrounds on many of the panels. These really need to be separated IMO.
I know all this stuff is in the process of being revamped, but please make this stuff clear, consistent and concise as well as provide good explanations and a diagram as to which setting affects which part of the UI.