
Custom Block Outline
Custom Block Outline A simple yet highly useful client-side mod that replaces Minecraft's default, boring black block selection outline with a vibrant, fully customizable colored highlight!
Screenshots



About this Mod
Custom Block Outline
A simple yet highly useful client-side mod that replaces Minecraft's default, boring black block selection outline with a vibrant, fully customizable colored highlight!
Now you can perfectly see which block you are targeting, even in the deepest, darkest caves or while building complex structures.
🌟 Features:
- Color Selection on the Fly: Toggle between Cyan (Blue), Red, Green, or default Black directly in-game.
- Thickness Adjustment: Make the outline ultra-thin or thick and bold for maximum visibility.
- No Restarts Needed: All changes are applied instantly without reloading the world or restarting the game.
🎮 How to Use:
- Look at any block in the world.
- Press the K key on your keyboard to open the configuration menu.
- Select your preferred color or adjust the line thickness using the
+0.5/-0.5buttons. - Click Done to save and return to the game.
📌 Requirements:
- Minecraft Version: 1.20.1
- Mod Loader: Forge
- This is a Client-Side mod. You can safely use it on multiplayer servers without needing it installed on the server side.
Available Versions
How to Install Custom Block Outline on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set forge Loader
In the panel under "Egg", select the forge loader and matching Minecraft version (1.20.1).
Install Mod
Open the mod browser in the dashboard and search for "Custom Block Outline". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.20.1
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Custom Block Outline server crashes on startup – what to do?
Most common cause: wrong forge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.20.1). You can switch loaders with one click in the panel.
Is Custom Block Outline compatible with forge?
Custom Block Outline officially supports forge for Minecraft 1.20.1. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Custom Block Outline – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Custom Block Outline consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
Rent Modded Server
Install Custom Block Outline with just one click on your server.