Despite the names of the palettes iron and iron_darker, the lightest three colors in both palettes are identical.
Steps to Reproduce:
On a word with 1.20 experiments enabled, apply Coast iron trims to an iron and diamond chestplate
Coast contains the three lightest colors of the palette which is why I chose this one
Place down two armor stands next to each other and place each chestplate on one armor stand
Notice the identical light colors
Locating the image files:
Navigate to the version jar under
.minecraft\versions\23w05aIf on a Windows system, you can type
%appdata%\.minecraft\versions\23w05ain the Run window (Win + R) for quick navigation
Open the jar file with an archive software such as WinRAR (or make a copy of the jar file somewhere and add
.zipto the end of the file name past the file extension and open it)Navigate to
assets\minecraft\textures\trims\color_palletesLocate the
iron.pngandiron_darker.pngimage files in the directory
Upscaled versions of the palette files are attached as well as a file with both palettes adjacent to each other to present the identical colors.
While the rest of the colors appear to be flipped between the palettes, that is being tracked in MC-259635.
Can confirm