Regency is used to refer to the period in Britain at the beginning of the nineteenth century, and to the style of architecture, literature, and furniture that was popular at the time. ...a huge, six-bedroomed Regency house. ...the Regency period.
I've heard an average of about 12 years. Heredity and diet can make a big difference. I had a yellow lab who died pretty suddenly at 10, but I know someone with a lab that is 18 years old. My current black lab is a rescue, so I don't know his age.
The life span of your yellow Labrador is unlikely to be any different from that of your black Labrador, or your chocolate one. As far as we know, with the exception of color dilution alopecia in silver labradors, inherited diseases are not linked to any particular color or type of Labrador.