Limn - Colored Block Outlines
Recolor the box drawn around the block you're looking at: any solid color you like, or a Rainbow that flows along the edges. Adjust opacity and line thickness . Client-side only, works with Mod Menu.
Screenshot 2026-09-22 212126.png
Description
Limn
Recolor the box drawn around the block you are looking at. Pick any color with the RGB sliders, switch to Rainbow for hues that flow along the edges, let a Chase light run around the block, or watch the outline turn red as you mine.
Limn is a small client-side mod for Fabric, NeoForge and Forge. Nothing needs to be installed on the server.
Outline styles
- Solid Color - any color and opacity you like.
- Rainbow - the outline cycles through every hue and flows along the edges.
- Chase (new in 1.1.0) - a bright band of your color sweeps across a dimmer outline.
- Mining Progress (new in 1.1.0) - the outline starts in your color and fades to red as the block breaks, so you can see how far along you are without looking at the cracks.
Also
- Opacity works in every style.
- Animation Speed and Spread control how fast Rainbow and Chase move and how much they change across one block.
- Line Width makes the outline thicker or thinner than vanilla, from 0.5x to 4x. This needs Minecraft 1.21.11 or newer; older versions of the game cannot draw the outline at any other thickness, so the slider is grayed out there.
- Visual only - it changes how the outline is drawn, not what you can target.
Supported versions
| Loader | Minecraft versions |
|---|---|
| Fabric | 1.18.2, 1.19.2, 1.20 to 26.3 |
| NeoForge | 1.21 to 26.3 |
| Forge | 1.16.5, 1.18.2, 1.19.2, 1.20.1 |
Install
Fabric: put Fabric API and the Fabric Limn jar for your version in your mods folder. Add Mod Menu to get the settings screen (Mods > Limn > Configure).
NeoForge and Forge: put the Limn jar for your loader and version in your mods folder. No other mods are needed. The settings screen is in Mods > Limn > Config.
Settings
| Setting | Range | Default | What it does |
|---|---|---|---|
| Enabled | on / off | on | Whether the custom outline replaces vanilla's |
| Outline Style | Solid Color / Rainbow / Chase / Mining Progress | Solid Color | Which look is drawn |
| Opacity | 1 - 255 | 255 | How opaque the outline is, in every style |
| Red, Green, Blue | 0 - 255 | teal | The outline color. Rainbow ignores it |
| Line Width | 0.5x - 4x | 1x | Thickness compared with vanilla (Minecraft 1.21.11 and newer) |
| Animation Speed | 0.1 - 5 | 1 | How fast Rainbow and Chase move |
| Animation Spread | 0 - 3 | 1 | How much Rainbow and Chase change across one block |
Changes apply straight away and are saved when you close the screen. Reset to Defaults puts everything back.
On Fabric without Mod Menu, edit config/limn.json in your game folder and restart the game. mode is one of Solid Color, Rainbow, Chase or Mining Progress.
Source and issues
GitHub - MIT licensed. Bug reports and suggestions are welcome on the issue tracker.
The Limn - Colored Block Outlines Team
