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Block Outline Customizer project artwork

CurseForge · Minecraft mod

Block Outline Customizer

A mod that let you customize the outline of blocks when you hover them.

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which Block Outline Customizer release should I use?

Updated 29 days ago
Latest stable file 1.5.0
Game version 26.3
Loader NeoForge

Block Outline Customizer 1.5.0 targets 26.3 with NeoForge. It must be installed on the client. Do not install it on the dedicated server. No extra mods listed for this file.

Where it goes

Is Block Outline Customizer required on the client, server, or both?

It must be installed on the client. Do not install it on the dedicated server.

Client Required
Dedicated server Not supported
Loader for this release NeoForge
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

This file is marked client-only.

Understand client and server requirements Read the Minecraft installation guide

What else does Block Outline Customizer 1.5.0 need?

1.5.0. Change the file and its required mods may change too.

No extra mods listed for this file

This file does not list any required mods. Do not add a library just because a different file uses it.

This file does not list any required or optional mods.

Before you install it

Add Block Outline Customizer without breaking your instance.

Built for Block Outline Customizer 1.5.0. Pick another file and the loader, install side or required mods may change.

  1. 01

    Stick to this file

    Use 1.5.0. It targets 26.3 with NeoForge; another release may have different loader, side or dependency requirements.

  2. 02

    Bring the mods it needs

    This file does not list any required mods. Do not add a library just because a different file uses it.

  3. 03

    Put it on the correct side

    It must be installed on the client. Do not install it on the dedicated server.

  4. 04

    Pick the file you checked

    Use the “Get this file” button beside 1.5.0. It opens that exact file at the source.

About this project

What does Block Outline Customizer add?

Block Outline Customizer

Customize your block selection outline with RGB colors, opacity, and more!

Tired of the plain black selection outline in Minecraft? Block Outline Customizer lets you personalize it with custom colors, RGB mode, adjustable transparency, and variable thickness!

Features

Full Color Control

  • Custom RGB Colors: Set any color you want (0-255 for Red, Green, Blue)
  • RGB Mode: Color shifting RGB style with adjustable speed

Outline Customization

  • Adjustable Opacity: From fully transparent to completely opaque (0.0 - 1.0)
  • Variable Width: Thicker or thinner outlines (1.0 - 10.0)*
  • Smooth Animations: Buttery smooth rainbow cycling

Easy Configuration

  • In-Game GUI: Press a keybind to open settings (no file editing!)
  • Real-Time Updates: Changes apply immediately
  • Persistent Settings: Your preferences are saved automatically

How to Use

  1. Install the mod (requires NeoForge or Fabric)
  2. Launch Minecraft and load into a world
  3. Press U (default keybind) to open the settings menu
  4. Customize your outline colors, opacity, and width
  5. Enable RGB mode for RGB colors!
  6. Click Done - your settings are saved automatically

Change Keybind: Options → Controls → Key Binds → Block Outline Settings

Version Support

Fabric: 1.20.1, 1.20.6, 1.21.1 to 1.21.11, 26.1.X

NeoForge: 1.20.6, 1.21.1 to 1.21.11, 26.1.X

Forge: 1.20.1

Installation

Requirements:

  • NeoForge or Fabric (for your Minecraft version)
  • Minecraft 1.21.1 - 1.21.11 or 26.1.X | Minecraft 1.20.1 for Forge
  • The .jar file

Steps:

  1. Download and install NeoForge or Fabric
  2. Download the mod for your Minecraft version
  3. Place the .jar file in your mods folder
  4. Launch Minecraft with the correct profile
  5. Enjoy!

Keybinds

  • U - Open Block Outline Settings GUI

Keybind can be changed in Minecraft's controls menu

FAQ

Q: Does this work in multiplayer?
A: Yes! Settings are client-side only and don't affect server gameplay.

Q: Is this compatible with OptiFine/Sodium?
A: Should be compatible, but not extensively tested. Report issues if found!

Q: Can I use this in modpacks?
A: Absolutely! No permission needed, just credit is appreciated. Tested with ATM10 and works perfectly!

Q: Will you backport to older versions?
A: Currently focused on 1.21.x. May consider 1.20.x and less if there's demand.

If you enjoy this mod:

  • ⭐ Leave a rating on CurseForge
  • Share with friends
  • Report bugs to help improve it

Project description from CurseForge.

Pick your setup

Block Outline Customizer by Minecraft version and loader

Choose the version and loader you play, then open the matching release.

35 available setups

Showing the newest 12 of 18 game versions. Older files are in the list below.

Check the dependencies, then try the file in a copied instance before changing a world you care about.

Recent files

Block Outline Customizer versions and loaders

48 of 48 releases match

Looking for an older file? The official CurseForge project page is in Resources.

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