and is there a code to remove the asterisk on just one field (cosmetic reason) but not the others? ;) I could manually add an * other I don't know how to make it red and rest of label text black...
However Marketo uses for="phone" which is not something you can address. So in your case I would just hide all asterixes and add them again fo rthe fields you want.
To get it red you want want to tru to put this in the form editors label field: