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

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

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.