MCRGB

MCRGB

Search for blocks based on the dominant colours in their textures.

by
7.6K Downloads
fabricdecorationgame-mechanicsutility
Rent Server with this Mod

Screenshots

MCRGB Screenshot 1
MCRGB Screenshot 2
MCRGB Screenshot 3

About this Mod

MCRGB Mod for Minecraft Fabric 1.20.1+

Youtube Trailer

Requirements:

  • Minecraft 1.20.1+
  • Fabric
  • Fabric API

Reccomended:

  • Cloth Config

Features:

A Colour Picker for Minecraft Blocks!

MCRGB is a client-side Minecraft Mod designed to assist building. It allows you to search for blocks based on the dominant colours in their textures.
Press the colour picker key (I by default) to open the colour picker GUI.
Colour Picker GUI

HSV, HSL, RGB and Hex Support!

Input your colours using your favourite colour space, and the mod will suggest blocks that closely match that colour.
If you are in Creative Mode and have Operator Level Permissions, you can click blocks to give them to yourself.

You can also see the breakdown of a block's colour info by hovering over it. This tells you the percentage each colour takes up in each texture, and which blockstates it corresponds to.
Optional: You can also view this info in regular inventories by changing the config.

Tooltip for Pink Concrete Powder with Colour Info

Tooltip for Birch Log with Colour Info

Tooltip for Redstone Lamp with Colour Info

Build using Colour Theory

Funky House Built with Complementary Colours
Cottage Built with an Adobe Colour Palette

Easily /give Yourself Dyed Leather Armour

Colour Picker UI with the hex colour

A Player wearing leather armour of the hex colour

How it works:

On first launch, MCRGB will generate a file, located in .minecraft/mcrgb_colours/file.json
MCRGB attempts to scan every block texture in the game and calculates the dominant colours by grouping together similar pixels based on their euclidean distance in sRGB space, and calculating the mean average of each group. The results are saved in this file. If you ever need to regenerate the file (if you've changed resource packs or added new mods which add more blocks), click the "Refresh" button in the colour picker UI.

When you input a colour to the colour picker, the list of blocks is sorted by the euclidean distance to each of the dominant colours in each texture. Each texture is weighted according to how much of that colour takes up in the texture.

Credits:

Mod created by bacco

Logo created by Whirdle

Available Versions

MCRGB 0.3.3+1.20.1release
MC 1.20.1fabric
January 3, 2026
MCRGB 0.3.3+1.21.1release
MC 1.21, 1.21.1fabric
January 3, 2026
MCRGB 0.3.3+1.21.11release
MC 1.21.11fabric
January 3, 2026
MCRGB 0.3.2+1.21.11release
MC 1.21.11fabric
December 24, 2025
MCRGB 0.3.1+1.20.1release
MC 1.20.1fabric
December 6, 2025

How to Install MCRGB on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).

3

Install Mod

Open the mod browser in the dashboard and search for "MCRGB". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.11, 1.21.10, 1.21.9 (+15 more)

Server-side

Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

MCRGB server crashes on startup – what to do?

Most common cause: wrong fabric 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 (1.21.11). You can switch loaders with one click in the panel.

Is MCRGB compatible with fabric?

MCRGB officially supports fabric for Minecraft 1.21.11, 1.21.10, 1.21.9. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with MCRGB – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if MCRGB 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 MCRGB with just one click on your server.

Recommended RAM
4 GBab €8/mo
Min. 3 GB | +1 GB pro 8 Spieler
Create Server Now
1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
Creative Commons Zero v1.0 Universal
Server-side
Unsupported

Supported Versions

1.21.111.21.101.21.91.21.81.21.71.21.61.21.51.21.41.21.31.21.2+8 more