What I did here:

First, I took the three ai files and kept all the colours only with the hue property, leaving the saturation and brightness to 100%, in the way I could know which basic colours would be there and what would be the relationship between them. After, I've got all the shades and tints and placed as different layer over the basic colour. Then, on the variations, I changed the hue values, but keeping the original relationship between them. Only for understanding what was happening there.

After, I made some colour variations on a mascot I created for a client.