Last updated: September 1, 2025
Privacy Policy
Welcome to our Color Blindness Test website! We understand that privacy is important to you, and we want to be completely transparent about how we handle your information when you use our free online color vision testing service.
The Short Version
We care about your privacy. That's why our color blindness test is designed to work entirely in your browser without requiring you to create an account or share personal information. We don't collect, store, or share any of your test results or personal data.
What Information We Don't Collect
Unlike many websites, we intentionally avoid collecting personal information:
- No account registration required - You can take our test immediately without signing up
- No test results stored - Your color vision test results stay only on your device
- No personal details requested - We don't ask for your name, email, or any identifying information
- No tracking of individual users - We can't identify who you are or link your visits together
What Information We Do Collect
To keep our website running smoothly and improve the experience for everyone, we collect minimal, anonymous information:
Website Usage Analytics
- Which pages are visited most often
- How long people spend on the website
- General geographic regions (like "United States" or "Europe")
- Browser type and device information (to ensure compatibility)
- Referral sources (how you found our website)
This data is collected through Google Analytics and is completely anonymous - it cannot be used to identify individual users.
Technical Information
- Your browser's language preference (to show the website in your preferred language)
- Your color theme preference (light or dark mode)
- Basic technical information needed for the website to function properly
How We Use Cookies
We use a small number of cookies to improve your experience:
Essential Cookies
- Language preference (so the website remembers if you prefer English, Chinese, or Japanese)
- Theme preference (remembering if you chose light or dark mode)
- Basic functionality cookies required for the website to work
Analytics Cookies
- Google Analytics cookies to understand how our website is used (anonymously)
You can disable cookies in your browser settings, though some features may not work as smoothly.
Your Color Vision Test Data
This is the most important part: Your test results never leave your device.
Here's how it works:
- The color vision test runs entirely in your browser using JavaScript
- Your answers and results are processed locally on your computer or phone
- No test data is sent to our servers or stored anywhere
- When you close the browser tab, all test data is gone forever
This means we cannot and do not know:
- What your test results were
- How many times you've taken the test
- Whether you have color vision differences or not
Third-Party Services
To provide our service, we use some trusted third-party providers:
Google Analytics - Helps us understand how the website is used (anonymously) Vercel - Hosts our website and ensures it loads quickly worldwide Google Fonts - Provides text fonts to make the website look good
These services have their own privacy policies, but none of them receive any personal information about you from our website.
Children's Privacy
Our color vision test is safe for children to use. Since we don't collect any personal information, there are no special privacy concerns for young users. However, we recommend that parents or teachers supervise children when using any online service.
Medical Disclaimer
While we take privacy seriously, it's important to note that our test is for educational and screening purposes only. If you have concerns about your color vision, please consult with an eye care professional for a comprehensive examination.
Your Rights and Choices
Since we don't collect personal information, most traditional "privacy rights" don't apply to our service. However, you can:
- Use any browser's private/incognito mode for additional privacy
- Disable cookies in your browser settings
- Use ad blockers to prevent third-party tracking
- Clear your browser data at any time
Changes to This Policy
If we ever need to change this privacy policy, we'll update the date at the top and post the changes here. We'll only make changes that maintain or improve your privacy protection.
Contact Us
If you have questions about this privacy policy or concerns about your privacy, please feel free to reach out to us at: [email protected]
We believe that privacy should be simple to understand and that you should have complete control over your personal information. Thank you for trusting us with your color vision testing needs!