I disagree about trademarking a colour; you've been able to do this in the UK for a long time. However, you should bear in mind that the trademark only holds in

I disagree about trademarking a colour; you've been able to do this in the UK for a long time. However, you should bear in mind that the trademark only holds in one industry, for which it is well known. For instance, Cadbury's holds purple for confectionery - they use purple on all of their packaging. Orange holds orange for the mobile phone industry, but easyJet holds it for airlines.