Show custom field only if available

Hi

I am using CustomPress and I know how to use the embed code to display a custom field on a template page, but how something ONLY if there is a custom field?

So for example, one CF is 'website' and IF someone fills it out it would appear on the site as

Favourite color: red

However at the moment, if they do not enter anything in, I'm left with

Favourite color:

How do I only show the label ONLY if there is a custom field?