There are many possible mixes. The ideal for the hairdressing business is that custom colors are created for each client according to their skin and eye color. This will make the client always return to their hairdresser who does their personalized color.
We suggest taking into account the base height you have (natural color), the type of reflection you want (color); the level of tone you want (how light or dark you want the color), if you have colored hair (level of tone).