With Photoshop I identified the six colour's RGB values and then ran them through a algorithm I developed which analysises RGB colour simularity. By entering a colour's RGB value the algorithm will identify the most similar colour from with in the Dulux paint colour ranges (Dulux has a paint colour palette of over 4,600 colours while the RGB colour gamut contains over 16 million colours). Three of these Dulux colour were identified and the image colours were changed as per the above image.