The number refers to the darkness level.The letter refers to the tone.
Natural (N) shades are ideal for keeping your natural tone.
PRO-TIP: N is best for covering gray hair and giving a natural-looking result. Since gray hairs have lost their natural pigment, they soak up dyes more steadily. That means that brighter color and reds won’t always look natural. If you prefer warm or red tones, mixing with the Natural (N) will give your hair a more uniform result.
Golden (G) shades have more yellow and some orange pigments. These tones add warmth to your hair.
Copper (C) shades have primarily orange pigments, these are vibrant shades.
Red (R) to achieve a red hue, pick from these red-pigmented shades.
Mahogany (M) For more purple and red pigments, use this line to get a red-violet tint.
Chocolate (C) Add warmth with these deep brown colors.
Ash (A) Ash tones are cooler.PRO-TIP: To counteract brassiness, choose from this line and mix with a Natural (N) tone.
(previously 5.7 chocolate chestnut)
(previously 6.7 chocolate brown)
(previously 7.7 chocolate caramel)