Custom Block Overlay
by Lunatic
Custom Block Overlay lets players set the color and transparency of the tint shown over the block they are looking at, with fixed, animated and chroma colors.
What it does
The overlay color is stored as four values, red, green, blue and alpha, each from 0 to 255, written in the config as a colon-separated string. The default 0:0:0:102 matches vanilla. Setting the alpha value to 0 makes the overlay invisible, and any other value keeps it visible at that strength. A change takes effect after the client is restarted.
Version 1.0+build.2 adds a configuration screen through ModMenu, so the color can be edited in the game without opening the file. Older config files are obsolete and are replaced by customblockoverlay.conf, and the old color is migrated into the new screen. The mod is open source under the MIT License and is published for Fabric only, with builds for 1.20.2, 1.20.3 and 1.20.4.
Only the client needs the mod, because it changes how the overlay is drawn on the player's own screen. Installing it on a server has no effect, and players without it see the vanilla overlay.
Key features
Custom overlay color
The overlay can be set to any red, green, blue and alpha combination, with each channel between 0 and 255.
Animated and chroma colors
Colors can cycle over time, including a rainbow chroma mode, instead of staying fixed.
Configuration screen
A settings screen in ModMenu edits the overlay color, replacing manual changes to the config file.
Invisible overlay option
Setting the alpha value to 0 hides the overlay completely while the rest of the mod stays installed.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Players on Fabric who want to change the tint over targeted blocks, and anyone who prefers editing this setting in ModMenu rather than in a text file.
How it compares
Chroma World Border is also a Fabric client mod released under the MIT License, with builds for 1.20.1 – 26.2, and it changes the world border rather than the block overlay. Simple Block Overlay is another Fabric client mod that is open source under the GNU Lesser General Public License v3.0 only, with builds for 1.20 – 26.2, and it covers the block overlay as well.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Custom Block Overlay | Fabric | 1.20.2 – 1.20.4 | Client-side only | 2024-01-26 |
| Chroma World Border | Fabric | 1.20.1 – 26.2 | Client-side only | 2026-09-05 |
| Simple Block Overlay | Fabric | 1.20 – 26.2 | Client-side only | 2026-08-20 |
Questions
Does Custom Block Overlay need to be installed on the server?
Which loader and versions does Custom Block Overlay support?
How is the overlay color changed?
In the catalog
Custom Block Overlay is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 13,907 mods support Minecraft 1.20.4.
More from Lunatic
Similar mods
What the author says
This Mod lets you customize the color of your block-overlay. - Open the Mod's Configuration-File (.minecraft/config/customblockoverlay.yml)
Official listing
- Modrinth page
- modrinth.com/mod/custom-block-overlay
- Owner
- Lunatic
- Published
- 2023-10-20
- Updated on Modrinth
- 2024-01-26
- Facts verified
- 2026-10-15