All Students of Chan Sui Ki (La Salle) College must wear a school tie.
Three Chevrons are sewn with golden threads on it.The Chevrons symbolize the long and faithful service which the members of the La Salle family had rendered to the Church and the State.
In 1969, the colour of the school tie was deep blue.Later, there was a change. Now the black tie is for regular students and red one is for prefects.