Thanks, just played with the 'old styles' via that trick you mentioned. Found the CDE is closer to medium colors. Odd they would hide these but still be available.
They're all sort of embarrassing relics from an earlier era. Other apps generally no longer offer anything that looks like those. Modern browsers, for example, generally offer either "light" or "dark." No gray, no polychrome.
Also odd is a medium tone or two is not one of the defaults, just bright or dark.
Very tough to work out a scheme using medium grays that still preserves legible text, and at the end of the day, being able to read the settings is what it's all about. Your site visitors never see it, of course.