Many users have requested a possibility for exporting their manually adjusted color themes as ECT themes. It isn't really feasible to create a 100% solution here, but we could make it possible to export the settings from the Java editor and backwards-map them to a theme file.
I think you could maybe have something like an 'import theme' on the website, so we could update our themes there. Sometimes I just want to change small things on an existing theme.
Maybe a "clone theme"?
That is already possible on eclipsecolorthemes.org. When you create a new theme, you can chose which theme to base it on and then adjust it to your liking.