Colour - The colour used for marking the boundary must be in a contrasting colour and tone to its background and the tables and chairs which are to be used.
Lliw - Rhaid i’r lliw a ddefnyddir i nodi’r ffin fod mewn lliw ac arlliw cyferbyniol i’w gefndir a’r byrddau a’r cadeiriau sydd i’w defnyddio.