These are skin tones that Iíve collected from some of my pictures.
Usually Iíll make the skin tone while Iím colouring but sometimes i will take them from a bunch that Iíve saved in my pallet.
Making a skin tone is quite easy (for cell shading). Realistic or painting styles colours are quite a lot more complex and require a lot more tones.
Cell shading needs 2 to 4, and some times even 1 colour with a gradient overlay can look nice.
When picking your colour its best to start with the middle tone. If you donít like it change it a bit with the Contrast or Hue and Saturation options till your satisfied. For the next tone you can make another layer above and set it to multiply and add the same colour overtop on an opacity of about 50%. This is good but if you want a more lively skin tone its best to do it by hand and choose a darker tone a with a bit more red or purple in it. If you want another darker tone apply the same principles but there should be less contrast so donít make the colours too different.
For the lightest tone you just want it to pop out a little and dot it onto the parts that stick out the most ( top of shoulders tip of nose, line the lips...etc)
Once your done and if it still doesnít look quite right remember you can still edit the saturation and hue, if the colours don't differ enough add contrast, if the colours are to bright bring down the saturation
hope this was helpful
feel free to use them if you want to