Eyebrow tint

[Lau174]

So I had a blonde client who has blonde hair, she requested hd brows. So I use refectocil, I mixed grey with a little brown then used the sensitive developer... They were literally black! Am I the only one who has had this problem? Could I of done this differently?
Just need a little advice
Thanks

 

[krum]

Did you use Light brown?
How long did you leave it on for?
Try applying and then immediately removing with wet cotton wool.

 

[MeganEmilyy]

How long did you leave it on for? I find brows take really quickly.

 

[tiara08]

You might have used too much grey, try a different ratio next time if you don't want to go as dark.