Inspired by the question Launch emacs with ediff-files (of ediff-directories) from command line and the answer https://emacs.stackexchange.com/a/3623/2609, I tried
emacs --eval '(set-background-color "green")'
from an MS DOS prompt without sucess. What is wrong with this? I also tried with the argument
-Q but it doesn't change.
I should mention that it works well if I execute it from an eshell inside emacs.