Rare Colours for Mk10 \ 420G

I was reading a book last night and it seems there were a few rare colours for these cars some which
were on the MK10 and some on the later 420G:

Carmen Red

Primrose Yellow

Signal Red

Ive not seen any cars advertised or in pictures in these colours

Has anyone seen our cars in that colour or have any pictures they can post.

Also was there any other rare colours Ive not mentioned