Thanks @lanlyn. I wondered about what I'd written down for her.
Here's the numbers I have:
Salty
R......100 .....61.....68....167
G......109 ....62 ...105....161
B......116....167 ..151....150
I'm wondering if the person who read the numbers did it in Stylist when the mermaids were in their tails. I did it in the mirror with Change Scale Colour. It would probably produce different numbers doing it in different ways.
Mia Azul
R.....170.......0.......1.....170
G.....196..200....159 ...229
B.....229..207....110 ...229
Maya Ocean
R.....157.....104.....104.....104
G.....222.....153.....153.....153
B.....203.....211.....211.....211
Triton King is the same as @lanlyn
I think, looking at the end result either set of numbers will work just as well. I don't think you'd pick the difference if you put them side by side.
It's probably just an average and I don't really know how those numbers work in the background - although I do have a book on that subject written by an artist I know who has spent decades working on how those numbers work and has come up with an entirely new colour theory for artists and printers.
All I know for sure is whatever number is used 'something' goes on in the background to make the image into a 3D representation so it can't be the exact same colour all over. If it was the exact same colour all over then it'd be just a flat colour with no shading or shaping to it.
I already had this conversation elsewhere in this thread a few days ago where hair colours vary slightly between hair styles.