In her clip, she told how they are actually called 'colour control patches' and they are used when the packaging is being printed. "I work in food marketing and we have these colour patches on all our packaging," she said. "They are colour control patches, we need them because the colours that you see on the packaging are not actually the colours that we're printing. Let me explain..."To choose the colours that you see on the packaging, we actually layer colours and the colour patches are the colours we are layering on top of each other to achieve the colours you see. "To make sure the colours are correct, we look at the colour control patches and if they're slightly off, we know that the whole packaging will be off."

Source: Daily Mirror May 23, 2021 18:15 UTC