Chopping Board Colour Coded Wall Chart. Ensure your kitchen is always hygienic with the Hygiplas colour coded wall chart. Easy to read and made with bright colours, the chart helps your staff identify the correct colour coded chopping boards and knives for each culinary task, helping you avoid cross contamination in the workplace. The chart can also be wiped clean to keep it sanitary and visible at all times. Identifies what colour chopping board to use in the kitchen, defines catering chopping board colours, different coloured chopping boards and their uses.