black-light ☆

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Description:
Apply special vision effects on your screen

Type: Cask | Latest Version: 3.0@0 | Tracked Since: Dec 17, 2025

Links: Homepage | formulae.brew.sh

Category: Productivity

Tags: accessibility color-blindness design testing utility

Install: brew install --cask black-light

About:
Black Light is a macOS utility that applies real-time color filters to your entire screen, simulating various vision effects. It enables designers and developers to preview how their work appears to users with different types of color blindness. This tool is essential for ensuring digital accessibility and visual inclusivity in design projects.

Key Features:

Real-time screen-wide color filtering
Simulation of multiple vision deficiencies (protanopia, deuteranopia, tritanopia)
Lightweight and non-intrusive operation
Easy toggle on/off via menu bar

Use Cases:

Testing website and app designs for color accessibility compliance
Simulating visual impairments for educational or empathy-building purposes

Alternatives:

macOS Built-in Color Filters – Native system feature, but Black Light offers a more focused and immediate tool for designers
Sim Daltonism – Another popular third-party alternative with similar functionality

Version History

Detected	Version	Rev	Change	Commit
Aug 5, 2025 2:15pm	3.0	0	VERSION_BUMP	02d5e7b1