How Google Chrome did it?In this picture, the title bar color follows the system settings. Chrome only provides dark and light title bars, but if you choose to color the title bar, Chrome’s title bar will also change color.
As far as I can tell, nobody from McNeel side said its not feasable. lts possible to override the style of any user control within Rhino just as any WPF/Eto app. Its just not as trivial as people think. I’ve created WPF apps in complete dark mode. Still it requires to override almost all default styles and this is a lot of work for “little” benefit in the end. It further requires a person knowing a bit of UI-design to make it appealing. So you cannot assign any programmer for this job. But in any case they said in the near feature they not planning to overwork the GUI at all.
The themes (light and dark) are available from 2Shapes for Rhino 0.1.2.1. In the latest beta (0.1.2.2) we added full theme customizable! You can use the colors you want!