don't use pantone 2685C
Candbury, which has been using pantone 2685C since 1914, has won a legal battle against Nestle for exclusive use of the color. Nestle challenged Cadbury in which they claimed it is not right for a company to trademark a color. However it was overturned by the High Court and Nestle lost.
...So don't use Pantone 2685C, Cadbury will hunt you down!