For the best color change efekt start with the Prusament PLA Pineapple Yellow:
https://www.prusa3d.com/product/prusament-pla-pineapple-yellow-1kg/
and after the color layer change continue with the Prusament PLA Royal Blue:
https://www.prusa3d.com/product/prusament-pla-royal-blue-blend-970g/
The author marked this model as their own original creation.