Custom colors in item types

Alright, I know I requested custom hex colors before, but could it at least be possible to use all the given colors for item type default colors, instead of only the colors we defined?

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As someone who relies on color-coding a lot, this is pretty annoying. My options are to either add all the colors available as my colors, which is tedious and I dont even know if you allow that many; or just give up make every item type gray, which I guess I could work with but seriously why is adding colors so hard