Spectrum

Instantly test your web page with different types of color vision deficiency.

What is Spectrum?

"Spectrum" is a Chrome extension that allows you to test your web page with different types of color vision deficiency. It is particularly useful for websites with data visualizations, ensuring colors are distinguishable in charts.

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Extension stats

This extension was removed from Chrome Web Store on 2023-08-30

By: Yehor Lvivski

Users: 21,907+

Rating: 3.77 (56)

Version: 0.2.0 (Last updated: 2017-01-11)

Creation date: 2017-01-11

Risk impact: High risk impact

Risk likelihood: High risk likelihood

Manifest version: 2

Permissions:

tabs
http://*/*
https://*/*
file://*/*

Size: 12.50K

Other platforms

Not available on Firefox

Not available on Edge

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Extension summary

Analyze keywords

Color Vision Deﬁciency (CVD) affects people’s ability to distinguish certain colors. Estimates indicate that approximately 200 million people worldwide are affected by some kind of CVD. Individuals of Northern European ancestry, as many as 8 percent of men and 0.5 percent of women experience the common form of red-green color blindness.

This extension helps you to test web pages for people with different types of CVD. It's particularly useful for websites with data visualisations, because some colors may not be distinguishable from other colors in the charts.

Flash enabled websites are also supported!

User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.

Pros

Helps with eye strain
Instantaneous color blindness simulation
Easy to use
Great for UX testing

Cons

Last update was in 2017
Some reported it not working on certain websites
Not accurate for all types of color blindness
Doesn't work on YouTube videos in full screen
Requires refreshing or restarting the browser after installation
May cause conflicts with other extensions or sites

Most mentioned

Not working or stopped working
Refreshing or restarting the browser
Works great but has limitations
Doesn't modify all DOM objects
Resetting of settings
Background colors/images not modified
Causes conflicts with other sites or extensions
Last update in 2017

Recent reviews

Actually got recommended to this extension from an article, I just feel i wanted to try it although i don't need it.. But to be honest this extension help my eyes from getting hurt than made it dark theme (i don't really like dark theme, also this is just my opinion). Btw beside of this extension last update is 2017, I saw some people saying this "not working", Idk if this because it's not working on some website or they forgot to refresh page. Because you literally need to REFRESH or RESTART BROWSER anytime after installing an extension. Note: btw on google search, I saw it's working but,, with the low-contrast mode it's make some things of article being highlighted (idk how to describe it) iis that normally like that or..? I don't have problem at all with that I just want to mention that. (here the photo since I am not good at describe thing:https://i.imgur.com/2WSyvmq.jpg)

Najla Nur Ariqah, 2021-09-03

Hi there! Is this project open source? could you send me the link? :D

Beatriz Albino, 2021-08-17

I'm a color vision expert and I must say this colorblindness simulator has a lot of shortcomings. It shows protanopia red way too dark, as well as deuteranopia red. It also shows protanomaly and deuteranomaly red hues way too reddish than what they truly perceive them. Their reds are much more closer to yellow hues. Tritanomaly simulation is almost the same as normal vision which is totally wrong. Tritanopia simulation is also wrong since it shows that they practicaly see a whole hue circle with some saturation loss, while in reality they only perceive two hues - our reddish pink and cyanish hue. All in all, if you want to use this extension, use only protanopia and deuteranopia simulations since those are the closest to being correct, but keep in mind that reds are represented darker for both types than what they should be, especially for deutans who see red wavelengths much brighter relative to green wavelengths (they still see both colors as yellowish hues) compared to normal vision. Deuteranopia simulation is actually very close to being correct if it was named protanopia, it just needs a slight double grays (around pink and aqua green) position shift.