Mmmmm well i don't have the palette.xml file setup properly for those, but I didn't find a page which lists all of the HEX values for each one of the colours the GBC used for its button combos:No, not the SGB colors
the GBC color you could select on the original GBC hardware with the button combinations before booting an GB game
https://tcrf.net/Game_Boy_Color_Bootstrap_ROM
I will upload my palettes.rar just for reference in case it helps.
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Maybe this could serve as an example for adding all of them into the palettes.xml file. This is a test code I made for the palette used for when you press Right only:
Code:
<game name="Right" use="1">
<bkgr c0="0xFFFFFF" c1="0x52FF00" c2="0xFF4200" c3="0x000000" />
<wind c0="0xFFFFFF" c1="0x52FF00" c2="0xFF4200" c3="0x000000" />
<obj0 c0="0xFFFFFF" c1="0x52FF00" c2="0xFF4200" c3="0x000000" />
<obj1 c0="0xFFFFFF" c1="0x52FF00" c2="0xFF4200" c3="0x000000" />
</game>