Screenshots

Description

From the perspective of a color blind person, some colors are impossible to distinguish. Sim Daltonism lets you visualize colors as they are perceived with various types of color blindness.

Move the Sim Daltonism window over something on the screen and see what it looks like with a color blindness. With this app you can check the accessibility of websites and other user interfaces, make your visual designs better for color blind people, or just play around to better understand how various color blindness types affect color perception.


The Filter Window

The Sim Daltonism window acts as a filter for what is under it. You can click inside and manipulate windows from other apps that are located under it.

But you can change this so the filter window follows the mouse pointer, displaying the area around it. This makes it possible to view the filtered image alonside the unfiltered one.


Performance

Sim Daltonism is fast enough to filter a video in real time or to have many filter windows active simultanously.

If needed, you can reduce or increase the refresh speed to save energy or improve responsiveness.


Simulated Vision

Sim Daltonism can simulate the vision of many forms of color blindness:

Red-Green
• Deuteranopia (no green cones)
• Deuteranomaly (anomalous green cones)
• Protanopia (no red cones)
• Protanomaly (anomalous red cones)
Blue-Yellow
• Tritanopia (no blue cones)
• Tritanomaly (anomalous blue cones)
All colors
• Monochromacy
• Partial monochromacy

Note that the colors shown are only an approximation. Color blindness varies from person to person and the simulator cannot represent everyone’s vision. Many other factors can affect the results, such as the automatic white point calibration of the camera. Nevertheless, Sim Daltonism is a good tool to better understand color blindness.

Sim Daltonism is open source and is also available for iOS.

What’s New

Version 2.0.5

• Corrected an issue with the filter where some saturated blues would incorrectly become purple.

Ratings and Reviews

4.9 out of 5
145 Ratings

145 Ratings

Aviris ,

Great tool - works for ANY other application

I love that if you can see it on your Mac screen then Sim Daltonism will work.

My primary machine is a Mac, but I work in the Windows world all the time mostly working with GIS and doing cartography. By using remote desktop and virtual machines I can still use Sim Daltonism to help check my graphics.

Thanks to the developer.

gbbowers ,

Indispensable tool for checking design against CVD

I use and highly recommend SD to my design colleagues as it provides a completely independent and non-intrusive overlay to similuate how users with color vision deficiencies see the interfaces we're building, and if they'll notice the differences in state change.

My only problem with the app is that it doesn't seem to currently handle the dark mode in macOS correctly, which causes the icons used for controlling the type of CVD simulated to become essentially invisible (black icons on a black toolbar). It's an ironic oversight, and I kind of have to guess where the icons are, usually hitting the refresh-rate menu instead. Should be a simple fix, so I hope the developer can take a minute to update the app.

Developer Response ,

I'm glad you like this app, but I can't replicate your dark icon problem on my end. Please send me an email if you want to investigate this further.

The Great Rift Valley ,

I've Been Using This Tool for Ages

It does exactly what it says on the tin.

It also has a pretty wide range of simulations (beyond the three that most apps have), and it is incredibly smooth.

Information

Seller
Michel Fortin
Size
5 MB
Compatibility

OS X 10.10 or later, 64-bit processor

Languages

English, French

Age Rating
4+
Copyright
Price
Free

Supports

  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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