OPI Cool Britannia - The Royal Collection Create a right royal look with these four stunning colours, one collection put together exclusively by the team Beauty Expert, to celebrate the marriage of Prince William and Catherine. Each nail varnish features a ProWide brush offering effortless application and sets quickly with no lamp necessary. Cool Britannia - The Royal Collection features: Dating A Royal - A royal blue that sets crowds spinning! Princesses Rule - A bright sparkly pink that\'s tiara worthy. Royal Flush Blush - All-girl pink pearl - \'deal\' with it. Royal Rajah Ruby - Jewelled burgundy befitting a prince\'s princess.