What colours do I need to mix to get dark ashy/smoky teal?

I'm after a dark ashy/smoky teal colour. I currently have a mix of my natural colour (medium brown) and bleached hair that was dyed blue, green, purple, yellow, and orange that has almost entirely faded. I plan on going to a salon to get a full head bleach but they don't have the colour I want, they said they're happy for me to bring my own dye. 

I've used Joico, Matrix, and Manic Panic in the past with some really good results but none of them have this kind of colour. I have seen lots of images of this colour but I can't find anywhere that says "I used this exact dye/formula in these amounts". I have seen the new(ish) brand Lunar Tides and their colours seem to be perfect but reviews seem really mixed about the dyes longevity with a lot of people saying it totally rinses out after a few washes. 

I would love to get to this colour, any help is super appreciated! (I don't know how to post pictures but there are links that show the colour - two of them are photoshopped but I think the colour is doable). I've also added some more smoky/ashy blue which I would also be happy with. 

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