Important: One thing to note up front here is that not all images actually have any areas in them that are supposed to be neutral gray, and obviously, you can't find what's not there, so if that's the case with your photo, no technique for finding midtone gray will work.
Unfortunately this colour is much more true to blue than green. I now have a soft turquoise but washed the colour out after only 10 minutes. So I'll be surprised if it lasts for more than 2 weeks. Overall I think the Joico colour has great pigment but don't go with the colours you see on the package!!
Did you want to lighten your hair? That would be the only reason to use a permanent hair color.I have type 3 hair so I relax my hair 2 to 3 times a year, but I tint it every 3 to 4 weeks to cover the gray. It is more important to me to color the gray and lighten my hair to a medium brown.hat would be the only reason to use a permanent hair color.I have type 3 hair so I relax my hair 2 to 3 times a year, but I tint it every 3 to 4 weeks to cover the gray. It is more important to me to color the gray and lighten my hair to a medium brown.