sim-daltonism ☆

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Description:
Colour blindness simulator for videos and images

Type: Cask | Latest Version: 2.0.5@0 | Tracked Since: Dec 28, 2025

Links: Homepage | @michelf | formulae.brew.sh

Category: Developer tools

Tags: accessibility design colorblind simulator developer-tools macos

Install: brew install --cask sim-daltonism

About:
Sim Daltonism is a real-time color blindness simulator that allows users to preview how images and videos appear to individuals with various forms of color vision deficiency. By applying filters that mimic conditions like protanopia, deuteranopia, and tritanopia, it helps designers and developers ensure their visual content is accessible. This tool is essential for verifying color contrast and distinguishability in digital interfaces and media.

Key Features:

Real-time simulation of images and videos
Supports multiple types of color blindness (protanopia, deuteranopia, tritanopia, etc.)
Interactive color picker with live preview
Works system-wide as a filter in any application
Open-source and available on macOS

Use Cases:

Testing UI/UX designs for color accessibility compliance
Previewing video content for color-blind audience compatibility
Educating designers about different color vision deficiencies

Alternatives:

Color Oracle – Cross-platform, but less integrated and not real-time in all apps
Stark (plugin) – Figma/Sketch plugin, more focused on UI design workflow

Version History

Detected	Version	Rev	Change	Commit