Custom Item Highlighter

The mod flags items that have a custom display name or custom NBT data, which covers most server plugins that rename items or attach data, and draws a border in the item's slot. Tier colors are read from the tier line in an item's lore, and items with several tier colors get a smooth animated cycle. The border follows the item through chests, the player inventory, the hotbar and modded HUD overlays such as Inventory HUD+ and MiniHUD, because the highlight hooks into the GUI item-render pipeline itself.

Border thickness, a fallback color, the color-cycle speed and the detection methods can each be set in the config. A built-in lore debug screen shows the exact colors of an item's lore, which helps when tuning detection on a server. Mod Menu opens the config screen when it is installed. Cloth Config API is bundled inside the mod, so no separate install is needed for it. The mod requires Fabric Loader and Fabric API, and runs on Minecraft 1.21.11 with Java 21 or later, or on the 26.x builds with Java 25 or later.

The mod is client-side only, so nothing needs to be installed on the server. The author, KazooKat, publishes files for Fabric only, across five release versions, 1.21.11 – 26.2, under All rights reserved. The code is not open source.