To install this package, run in Emacs:
M-x package-install RET tramp-theme RET
This is a custom theme for remote buffers. It is not an own custom theme by itself. Rather, it is a custom theme to run on top of other custom themes. It shall be loaded always as the last custom theme, because it inherits existing settings. This custom theme extends `mode-line-buffer-identification' by the name of the remote host. It also allows to change faces according to the value of `default-directory' of a buffer. See `tramp-theme-face-remapping-alist' for customization options.