With these 3 colour variations, I have like a few colours used in each of them. Firstly the uniform, I opted for a fully clean white, the trousers will be chequered and a red scarf. In terms of character complexion, I have opted for a brighter whitish one, and a slightly darker nose (which reminds of Disney). The facial hair, will be a lighter hazelnut colour like variation 1, finally for the eyes, I have chosen blueish.
Therefore the final colour choice looks like :