Healing Tint Shard

You'll receive this item after giving Resin to an NPC named Jar located near the Abandoned Expeditioner Camp Expedition Flag.

Once you get to the stone brick path at the Sanctuary Maze section, head to the path on the left and follow it to find a Healing Tint Shard.

Turn to the left path from the Paintress Shrine Expedition Flag, defeat the enemies there and pick up the Healing Tint Shard by some crates.

 Melosh