If i had an extensive collection for some ungodly reason (even then it would be condensed)- it would most likely be:
1. Reds/Pinks/Purples
2. Greens/Teals/Blues
3. Highlights [warm] (Warm Neutrals/Golds/Peaches/Apricots/Browns would go here under the 'yellow/orange' umbrella too)
4. Greyscale [cool] (Cold Neutrals/Silvers and colours with a very strong, solid, grey base included)
I would arrange each colour in each colour family like so (within the palette): The more solid, vibrant colours would take up the top corner, the more pale shades would take up the middle, descending in gradient and shade intensity with the most pale in center. The more darker variations would huddle at the end corner. Everything would follow their respective gradient, hue and tone.
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The reality of my situation is, I really only see myself having one x15 palette. I'm far too 'lazy' to open multiple palettes for the shades I'm after I usually relapse into sorting 'favourites' into one palette. Then there's the instinctual begging to BALANCE the colour families I decide on.
I don't do well with harsh yellows or vibrant purples because I have warm toned, asian skin and in conjunction with said colours, that ends up making me look too sallow. I don't usually wear cool shades quite well and some colours I like to have an abundance of..while others, one or two shades suffice. As such, my dilemma does not lie within 'which palette to place it' (because I'd really only have one palette)...but rather, where to arrange it within the one x15 palette I intend to own. Although it's only a dilemma because I have not solidified my selection and that makes it really hard to determine which colour and where on the palette it 'belongs'.
At the moment I face the task of arranging every colour family into one x15 pro palette. It changes the whole playing field by a lot because there really isn't a whole lot of methodically aesthetic options- it ends up beggin some sort of abstract art.
So far, it's to do with categorising what colours blend seamlessly with what other colour, but it changes with the colours I decide on. At one point, I had them organised like an adaptive RGB spectrum. I currently have 4 Reds/Pinks/Purples, 6 Greens/Teals/Blues, 5 warm neutrals/golds and a separate x4 greyscale palette. So for the moment, it looks closer to a whole MS hexagonal colour palette; rotated and flipped a few.
I have some singles on reserve... because sometimes I don't like colours getting it on with other colours in the pan. 8D