I think, the ASCII theme is good as it is. There is no need to change
it to the reddish shade like Jessie's. Green is known to be more
relaxing on the eyes. Please, take into account also those who have to
take extra measures to protect their eyes.

If this cannot be done, please, inform me which package provides the
themes as they are, so that, I would be able to make a backup. Also
make sure anyone would be able to install older themes to avoid having
to install the modified ones for ASCII.