Most wig colors are the same as weave colors as far as numbers go. But please be aware that this is human hair that is being dyed to fit your specific needs. Each wig comes from a different individual. Shades may vary. Think of it as if you and your sister both dye your hair using the same products. You both may get slightly different colors than one another. Even if you have the same color hair to begin with, the same mother and father. 

Because of the oxidation process the outcome of color depends on  a persons body chemistry.