Black Light Pro

Color effects on a schedule.

Add visual effects to your screen so your eyes can rest or for fun. Setup your effects and switch when needed with a hot key or at predetermined times, including sunrise or sunset.

Compose your Effects

Each effect can include a mix of dimming, tinting, and inverting the screen. Compose your own. Invert and make the screen all-red if you’re into astronomy. Tint with orange-yellow to help you sleep better, or blue to keep you awake.

Additional effects you can include in the mix: overexposure (making light grays white) and HDTV Luminance 16-235 correction (to adjust your colors for your TV set).

Timer, Sunrise & Sunset Activation

Effects can be automatically triggered based on your Mac’s clock or your local time for sunrise and sunset. You can chain multiple transitions to change colors as you like throughout the day.

If your Mac is asleep or Black Light Pro is not open at the time an effect was supposed to activate, it will catch up as if it was open the whole time.

Smooth Transitions

Don’t get hit by a sudden color change! Each effect includes two configurable fade-in durations. One for manual actions and one for timer actions. In other words, when hitting a hot key you don’t want to wait for a slow transition whereas when it happens automatically, you might want a more subtle fade.

Effects That Stick ?%$$#%?&*

Black Light Pro generates a color profile for the screen after every transition. This makes it much less likely you will get flashed with “normal colors” when something else disables the effect by altering the gamma curve. This is ideal if you use applications or games that sometimes reset the gamma curve.

The original color profile is restored automatically when you quit Black Light Pro.

* This feature is not available in the Mac App Store version.

Comprehensive Multi-Screen Support

Have more than one screen? No problem. Different screens can have different effects applied to them. Each effect has its own set of screens it applies to when you press its hot key or when the timer activates it.

Hot Keys

Each effect can be activated from any app by assigning it a global hot key. In addition, you can adjust various aspects of the effect currently active using more configurable hot keys.

If you have more than one monitor and many effects are active at the same time, a key will let you toggle between effects to choose which one you want to adjust.

On the Menu

The dock menu will show you the list of available effects. From there, you can make effects active or inactive even if they don’t have a hot key. You can also move the Black Light Pro icon to the menu bar, freeing space in your dock.

Free Trial


macOS 10.11 El Captain or later.

The invert filter does not work in macOS Sierra 10.12.4 through 10.12.6 due to a bug in macOS. Upgrade to High Sierra to get a functioning invert filter.

Applying effects using a color profile is not available on the Mac App Store version of the app due to sandboxing restrictions.

Vision & Color Apps

  • © 2003–2023 Michel Fortin.