Here's how I would do this in Majirel (totally achievable in my opinion):
- Cleanse out the semi 6 with Effasor + 60ml warm water
- Mix Majirel 1/4 5 + 3/4 5.62 + 1/4 Red Mix tone + 75ml 20 vol
Apply to roots
- Mix Majirel 1 tube 5.62 + 1/4 Red Mix tone + 75ml 20vol + 15ml Warm Water
Take through immediately for 35 mins.
Here's why:
- The old semi colour will flatten the red, so it's best removed first.
- 5.62 will give you a red-violet colour reflecting.
- Adding red mix tone will add vibrancy- but don't add extra developer.
- Adding natural 5 to the roots mixture will give the colour extra depth to reach the true 5.62, since you are darkening the natural base (otherwise it could look wishy-washy).
- Don't add natural base to the lengths and ends colour or you reds will 'brown out'
The same rules apply to most other colour lines, but it would be cool if someone had a Matrix formula too!
Extra tip: If you feel the red needs a more vibrancy or to adjust the tone slightly after rinsing, apply a red glaze at the basin e.g. Dialight 1/2 tube 5.66 + 3cm 4.20 + 6 vol