One school of thought is the best way to correct a mistake is to not make one in the first place. Although this concept sounds great in theory, it is not always possible. Colour correction is not as simple as, for example, painting a room. You cannot just slap another coat of paint on to mask it. Pigments from permanent make up will coexist in the skin. To change a colour, you will need to first neutralise it so that it can then be brought to a correctable state. This modification usually means adding a completely different colour to offset the colour irregularity. For example if you have blue but wanted brown , you will need to add mustard-coloured yellowish orange to the colour needed to achieve a brown with a strong yellowish-orange tone. If the situation is intense, the colour corrector is first tattooed into the skin and then the desired colour is implanted afterwards. For a less intense situation, the modifier is added to the desired brown tone to ensure enough of the corrector colour to counter balance the existing tone.