Changing individual "Product Option" text color and size

Hi, I wondered if someone could help me with this. I am trying to change only one "Product Option" text color and size. I have tried every which way I could think of and it still won't change. This is what I have been playing around with.

label.attribsInput tab_attrib-31-0 {color:red; font-size:14px}

On a product I have a section for comments with a text field. I want the word "Comments" to be 14px and red.

Any help would be greatly appreciated.

Thanks,
Ladybugmom

You can see what I mean on this test product #1 under the tab "Customize" near the bottom.
http://bumblebeebuttons.com/index.php?main_page=product_info&cPath=23&products_id=48

Not sure what you're asking. Do you mean the Customize tab between Description and Details ?

Sorry, I misread the question. I think you'll have to install the Flexible Attributes mod from the Plugins area.

Thank you. I figured it out by going a different route. I put "Comments" in the comments section of the Product Option and then made it a blank text option. That worked.

Thanks again.