No: 6N - Dark Blonde

(Applied on Dark Blonde - color remains the same and covers grey hair)

6N can be used on the following colors to achieve
warmer reflects: 3N - 4N - 5N - 7N
dark tone color: 4D - 5D - 7D - 8D - 4M - 5M - 7M - 4R - 5R - 7R - 8R - 7C

6N - Dark Blonde with 5% grey hair
If grey hair is all over the head, you can use 5k, this will create highlights on the grey hair and Copper Chestnut on the rest of the hair. On more than 5% you must use this formula.

6N - Dark Blonde with 10% - 20% grey hair
Mix 25ml of 6N, 35ml of 5R, 60ml of glycol to get a Copper Chestnut.

6N - Dark Blonde with 30% - 50% grey hair
Mix 30ml of 6N, 3Oml of 5R, 6Oml of glycol to get a Copper Chestnut.

6N - Dark Blonde with 60% - 100% grey hair
Mix 45ml of 6N, 15ml of 5R, 60ml of glycol to get a Copper Chestnut.

This formula will apply for 5D (Light Golden Chestnut), 7D (Golden Blonde), 8D (Light Golden Blonde), 5M (Light Mahogany Chestnut), 7M (Light Mahogany Blonde), 7R ( Copper Blonde), 8R (Light Copper Blonde and 7C (Ash Blonde).