improvements to the 'clean' theme

themes/clean.zsh-theme

-PROMPT='%n:%{$fg[blue]%}%B%c%b%{$reset_color%} $(git_prompt_info)%(!.#.$) '
+if [ "$(whoami)" = "root" ]; then NCOLOR="red"; else NCOLOR="white"; fi
+
+PROMPT='%{$fg[$NCOLOR]%}%n%{$reset_color%}:%{$fg[blue]%}%B%c/%b%{$reset_color%} $(git_prompt_info)%(!.#.$) '
 RPROMPT='[%*]'
 
 # git theming