(I realise that NeoVim has this.)
Update: Looking at the version8.txt[1] on github, the option seems to be `set termguicolors`
Change seemed to take place at version 7.4.1799[2]
[1]https://github.com/vim/vim/blob/master/runtime/doc/version8....
[2]https://github.com/vim/vim/blob/master/runtime/doc/version8....
Problem: Cannot use true color in the terminal. Solution: Add the 'guicolors' option. (Nikolai Pavlov) Files: runtime/doc/options.txt, runtime/doc/term.txt, runtime/doc/various.txt, src/auto/configure, src/config.h.in, src/configure.in, src/eval.c, src/globals.h, src/hardcopy.c, src/option.c, src/option.h, src/proto/term.pro, src/screen.c, src/structs.h, src/syntax.c, src/term.c, src/term.h, src/version.c, src/vim.h
Update: Looking at the version8.txt[1] on github, the option seems to be `set termguicolors`
Change seemed to take place at version 7.4.1799[2]
[1]https://github.com/vim/vim/blob/master/runtime/doc/version8....
[2]https://github.com/vim/vim/blob/master/runtime/doc/version8....