points awarded in each event throughout the year are added up, and the house with most points is awarded the Cock House Cup, which is the traditional name given in British public schools for the in-school competition cup. The school's official livery colour is green, picked as a house-neutral colour. School uniform The school's uniform up to the end of Fifth Form is a white shirt, grey trousers and a blazer. A grey or dark blue, v-neck pullover with or without sleeves may also be worn. For the lower and upper sixth, navy blue or grey suits are instead worn, and upper sixth formers are permitted to wear pastel shaded shirts. A woollen scarf in the school colours: green, red and white; the sixth form scarf has longitudinal stripes. All years are required to wear one of the approved school ties. Various ties are awarded for sporting, artistic or social achievements, along with half and full colours awarded for services to the school and house colours awarded for services to the house; Senior Prefect ties are awarded to those with the position. Recently there have also been commemorative ties celebrating 450 years since the granting of the Royal Charter, and 500 years since the founding of the school. Sport Sport is compulsory for all years during games periods and if selected for a team can require compulsory attendance on Saturdays. In the Michaelmas term rugby union is the main sport, hockey is also played. In the Lent term hockey is the main sport, rugby sevens is also played In the Trinity term cricket is the main sport, athletics is an option. The sports of badminton, cross country running, fencing, football, golf, judo, rowing, sailing, swimming, target shooting and tennis are available, the list varies by year and term. Sixth form also have a "Spectrum" games option where boys are permitted to use any of the facilities at Guildford Spectrum during the games period. The school has enjoyed some success in rugby where it has had first and second places at various levels of the Daily Mail Cup. On 6 February 2016, Old Guildfordian Jack Clifford became a full England rugby international when he made his full debut as a replacement for Chris Robshaw during the Calcutta Cup match after 69 minutes. Since 2003 the six Royal Grammar Schools (Colchester, High Wycombe, Guildford, Lancaster, Newcastle, Worcester) have held the "RGS Cricket