Solutions request in entry meta bar


I would like to know how to change the font color and font background from the comments word in the entry meta bar without changing the category words from the same entry meta bar.

You suggested me to do :
Admin Area -> Appearance -> Theme Options -> Other Tab -> Custom CSS

.entry-content .tags a font {
color: #0000ff;

but it doesn’t work.

So please, do you have any other solutions to tell me ?
thanks for your reply.

Could you please post your website URL where comments are displayed as I can’t seem to find anywhere on your website where you are using comments. They are disabled on all post that I checked.