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!!
The Perfect Hair Color: You and your stylist were in perfect sync and your locks are gorgeous and need to stay that way. Standard time in between appointments is 4-6 weeks, since your hair grows on average Â½â a month. Of course you can stretch this out to 6-8 weeks if you donât mind the roots. Being able to stretch it out usually depends on what your natural hair color looks like compared to your artificially âsweetenedâ hair color. For example, if youâre naturally a medium ash brown and youâre addicted to platinum blonde, youâll probably need to go closer to 4-6 weeks since the roots will have a lot more contrast when they start to show up.