Monosvkem has been deprecated in favour of quiet which was included in vim9 as part of a runtime update shipped alongside patch 9.0.0130.
quiet was built as a neutral platform users could easily add their own tweaks to using autocommands. Unlike Monosvkem it is entirely 256colors-safe.
As both colorschemes share a common core, it should be relatively painless to add your own tweaks in your .vimrc, as shown below:
augroup highlight_override
autocmd!
autocmd ColorScheme quiet hi String ctermfg=4
autocmd ColorScheme quiet hi Special ctermfg=1
augroup END
Monosvkem trades the all too common angry fruit salad for the subtle hues of the goopy mess stuck at the bottom of the cement mixer.
Monosvkem only bothers itself with comments, stringsand things that get
linked to thespecial group.
It used to be a dirty hack of Iosvkem but it has since been rewritten from scratch to support both dark and light backgrounds.