Spectrum

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

Spectrum - Test Your Web Page with Color Vision Deficiency

"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

By: Yehor Lvivski

Users: 10,000+

Rating: 3.77

(56)

Version: 0.6.0 (Last updated: 2024-12-30)

Creation date: 2017-01-11

Risk impact: Very low risk impact

Risk likelihood:

Moderate risk likelihood

Manifest version: 3

Permissions:

activeTab
scripting

Size: 21.77K

Email: lv*****@gmail.com

Ranking

# 7,933 ▲ 29

Other rankings

#2875 in Developer Tools ▲ 8

Other platforms

Not available on Android

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 Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.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 reduce eye strain with color adjustments.
Works instantly without needing to reload the page.
Offers a range of color blindness simulations.
Useful for UX testing.

Cons

Requires a refresh or restart after installation.
Doesn't work on certain websites like YouTube in full screen.
Needs to be re-enabled after every page reload.
Simulations for some types of color blindness are inaccurate.
Doesn't change background colors/images.

Most mentioned

Issues with functionality on certain websites.
Need for refresh/restart after installation.
Color simulations are inaccurate for some types of color blindness.
Instant application of filters without reloading.
Desire for better labeling of color blindness types.

User 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.