HOW TO CHOOSE FF TONES:
If you have blonde hair, from dark blonde to light blonde, you can successfully use any of the FF tones.
If you are a brunette you will achieve a perfect colour result using FF3 Plum, while the other FF shades would give you a less intense colour result.
If you have a very light colour base or high % of grey we suggest to use the FF tone in combination with a Natural shade (in case of FF3 Plum, use 5N Light Chestnut, while for all the others FF shades, 7N Blonde is the most appropriate one). Otherwise your colour result could be brighter than expected.
A strand test is generally recommended before using the colour on full hair.