I have a gruvbox theme applied to Vim inside vimrc. The problem is that when I run the :terminal command inside Vim the colorscheme is different from either the Vim theme or the Terminal theme. I have tried this on Hyper and iTerm2 and it is the same. Somehow the neither of the colorscheme gets applied to the :terminal. I did try looking at the discussions in github but my knowledge of Vim is not sufficient to understand it. Can someone can explain the problem and the solution? I am running Vim version 8.2.900, Hyper 3.0.2, iTerm 3.3.10.
The :terminal palette is supposed to be a list named g:terminal_ansi_colors, which your colorscheme doesn't define.
You should use their issue tracker to report that oversight and get it fixed… or use a more competently written colorscheme.