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Yep, disabled Night Shift, but forgot True Tone is still a thing, and I have a warm light on. Result say my green is turquoise.

Having True Tone on should really make your results more accurate. (Ideally you'd be in a room lit with D65, though)

Yeah, not an expert on True Tone but I'd leave it enabled. I agree it should help if it does what I guess it should.

That being said I haven't read about it in a long time nor tested without it.