OP (machinetched): for a new user to post an unexplained link to some other arbitrary site is considered very bad form in most contexts, and is likely to get both you and this entire thread deleted as a spammer.
However I do agree with your point, and together with a number of other people scattered around the programming community feel that today's emphasis on "pastel shades" and attempts at bit-precision in development environments detracts from the "user experience" particularly for those of us with ageing eyesight. Slapping on a "dark theme" isn't much of a fix if the underlying visual design is poor.
It is fashionable to mention early versions of Turbo Pascal, the later DOS-based TopSpeed environment, Visual BASIC for MS-DOS plus of course general-purpose tools like MultiEdit. But predating all of those was the Point editor ** from Logitech, which they both bundled with their compilers and used to demonstrate the potential of the newly-invented "mouse".
However I'd go slightly further, and suggest that the unix ecosystem has suffered from never having had a decent text-based form builder and associated development environment- or at least an accessible one since I think that Empress etc. filled that niche but was expensive.
However that boat has well and truly sailed now that GUI-based programming has replaced Curses etc., and most data entry and query operations are done via "the web" with programmers content to pull code from arbitrary repositories on the assumption that it will work. Obligatory xkcd
https://xkcd.com/2347/I'd add that a problem with all TUI-style IDEs is that textmode sessions in Windows, OS/2 and (as far as I can tell) the rest don't have an equivalent to unix's WINCH (window-changed) signal, so the code running in them doesn't know that it's got to resize its presentation (i.e. window placement, overall screen outline if used, and so on).
**
https://texteditors.org/cgi-bin/wiki.pl?PointMarkMLl