Context
I have a beautiful and beautiful setup on iTerm2 (I use a Mac), where the default shell is ZSH , and it is correctly configured using Oh -my-zsh and the Agnoster-fcamblor theme .

Question
As a user of Spacemacs, I would like to do as much as possible without leaving Emacs. Therefore, I decided to call the terminal window from the inside, as I'm used to doing with Vim / tmux.
This is the look I get (in the same directory):

Things I checked
Apparently, the topic does not apply.
This is an important part of my ~/.spacemacs :
(shell :variables shell-default-shell 'ansi-term shell-default-height 30 shell-default-term-shell "/bin/zsh" shell-default-position 'bottom)
A few important things:
$> echo $0 shows me ZSH , the shell used inside Spacemacs.$> echo $PS1 shows that it is correctly installed and corresponds to iTerm2.- I tried to find the configuration file that I am using, but as the above fact shows, it is already loading.
Question
How to apply Oh-my-zsh theme in Spacemacs shell window?
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