I am not sure you could get good colour matches with the Pearl-ex without lots of trial and error yo would have to mix several together to get that green, the red and blue would be less problematic and I can't tell what colour the end one is unless it is supposed to be white or gray. Does it have to be pearl-ex? Ordinary pigment pastes would be easier to get the colours you need red, yellow, blue, green, black and white you can use them to get almost any close colour match.
Peter