Super simple patch that makes the auto reserve tank indicator on the HUD turn pink (or whatever color your full Etanks/explored map tiles are) when reserves are 100% full.

The best part is that it uses no freespace at all. See asm files for details on that, it's accomplished by optimizing parts of the HUD routine and deduping an auto reserve tilemap.

Works with xkas and asar. Credit to PJ's logs as always.

If you have any issues or need help repointing things due to patch conflicts, feel free to get a hold of me.

See also: My reserve tank bugfixes patch which makes reserves better.
https://metroidconstruction.com/resource.php?id=418