ColorBlindness Client
by cech12
ColorBlindness Client simulates color vision deficiency on the player's own screen, covering red, green, blue and achromatopsia effects.
What it does
The mod applies client-side post effects that imitate color blindness, so a player can see how the game looks with reduced red, green or blue perception, or with no color at all. Each effect is chosen by a key binding or a chat command, and a separate command clears the active effect. It is meant for checking the visibility of interfaces and builds, and it changes nothing on the server side.
The mod is published for Fabric, Forge, NeoForge and Quilt, across 12 release versions 1.21.1 – 26.3. Fabric API is required on every loader that uses it. Only the client needs the mod, so players can join servers without installing it, and it is compatible with Optifine shaders. The code is open source under the MIT License, and public links exist for the source code, the issue tracker and the wiki.
Key features
Red, green and blue effects
Separate simulations cover red weakness, green weakness and blue weakness, each reducing perception of one color channel.
Achromatopsia effect
A full grayscale simulation shows the game without any color, selected with its own command or key binding.
Chat command control
Chat commands turn each effect on and clear the active one, so the simulation can be changed without leaving the game.
Shader compatibility
The post effects run alongside Optifine shaders, so a shader pack can stay active while the simulation is applied.
Gallery
Compatibility
Latest build for each game version and loader.
26.x5 of 5 versions with builds
1.21.x7 of 7 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Who it’s for: Players who want to see how the game looks under color vision deficiency, and developers who check the readability of color-coded interfaces. Only the client needs it, so it suits single-player games and servers that want no extra installs.
How it compares
Remove Blindness is a NeoForge mod for 1.21.1 that runs on the server alone, released under the MIT License and open source, so it changes the server rather than the player's screen. SpeedrunUtils is a Fabric mod for 1.21.11 that is server-side only, also under the MIT License and open source, and it covers a different set of tools for runs. Mob Blindness is a Fabric mod for 1.16.2 – 1.17.1, server-side only and open source under the MIT License, and it affects mobs rather than the player's view.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| ColorBlindness Client | Fabric, Forge, NeoForge and Quilt | 1.21.1 – 26.3 | Client-side only | 2026-09-22 |
| Remove Blindness | NeoForge | 1.21.1 | Server-side only | 2025-01-17 |
| SpeedrunUtils | Fabric | 1.21.11 | Server-side only | 2026-01-22 |
| Mob Blindness | Fabric | 1.16.2 – 1.17.1 | Server-side only | 2021-10-26 |
Questions
Does ColorBlindness Client need Fabric API?
Does the server need ColorBlindness Client?
Which game versions have files?
Does the mod work with shaders?
In the catalog
ColorBlindness Client is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 8,071 mods support Minecraft 26.3.
More from cech12
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What the author says
ColorBlindness Client is a Minecraft mod (Forge, NeoForge, Fabric, Quilt) that provides color blindness post effects which can be enabled by key bindings or chat commands. This mod is compatible with Optifine & shaders!
Official listing
- Modrinth page
- modrinth.com/mod/colorblindness-client
- Owner
- cech12
- Published
- 2025-10-29
- Updated on Modrinth
- 2026-09-22
- Facts verified
- 2026-10-15