This year, Colour Festival once again invaded Splott Warehouse in order to put on another colourful extravaganza for all you Cardiff music lovers, and this time they aimed to be bigger and better. And nothing says big like a big wheel and a collaboration between MTV, the Holi Festivals of Colour, and Sourz – a drink loved and feared in equal measures. Cardiff Times, being the helpful creatures we are, have devised a list of dos and don’ts that you…