I think they're trying to find the values they used when they changed the default skin colors with the hue / saturation tool.
In that case, you might just have to find the values yourself by trial and error.
Keep in mind, though, that you can't just "undo" a hue / saturation / lightness change, as the values won't line up even if you just did them backwards.
If your original change was 20 hue / 120 saturation / -20 lightness, making another change with -20 hue / 80 saturation / 20 lightness would not "reverse" your change. In the future, I would suggest saving another copy before you make a destructive change like this.