Privacy Policy

Introduction

ZHUI (hereinafter referred to as “we”) places great importance on protecting your privacy. This Privacy Policy explains how we collect, use, store, and protect your personal information when you use the ZHUI Color Lab (hereinafter referred to as “the Service” or “this tool”).

By using this tool, you agree to the terms of this Privacy Policy. If you do not agree with this policy, please stop using our service.

Information We Collect

1. Automatically Collected Information

When you visit our website, we may automatically collect the following technical information:

  • Browser type and version
  • Operating system information
  • IP address (anonymized)
  • Access time and page browsing history
  • Device type (desktop/mobile)

2. User-Provided Information

When you interact with us through the following methods:

  • Contact Form: Email address, name (optional), message content

3. Information We Do Not Collect

  • We do not collect any color data you select, convert, or manage
  • We do not collect color palettes or palette content you create
  • We do not collect sensitive personal information (ID cards, bank card numbers, etc.)
  • We do not use third-party tracking tools (such as Google Analytics)

How We Use Information

The information we collect is only used for the following purposes:

  • Service Provision: Operating and maintaining the normal functions of the website and tools
  • User Support: Responding to your questions, suggestions, and feedback
  • Security Protection: Detecting and preventing fraud and abuse
  • Service Improvement: Analyzing usage trends to optimize product experience (anonymized statistics)

We promise not to use your personal information for marketing purposes or sell it to third parties.

Local-First Data Processing

The Color Lab follows the “local-first” principle, with all core functions running locally in your browser:

  • Color Conversion: All color space conversions (Hex/RGB/HSL/HSV, etc.) are completely calculated locally in the browser, with no data uploaded to servers
  • Palette Management: Palettes and colors you create and save are only stored in your browser’s local storage (localStorage), which we cannot access
  • Accessibility Check: WCAG contrast validation and accessibility analysis are performed entirely locally, with no results recorded
  • Live Color Lab: Color picker functionality runs locally, and color data never leaves your device

Information Sharing and Disclosure

We will not sell, rent, or trade your personal information. Information may be disclosed in the following circumstances:

  • Legal Requirements: Complying with laws and regulations, court orders, or government requests
  • Rights Protection: Protecting our or users’ legitimate rights, safety, and property
  • Service Providers: With third parties assisting us in operating the service (such as cloud service providers), but only to the necessary extent

Data Security

We take the following measures to protect the security of your information:

  • Using HTTPS encryption to protect data transmission security
  • Strictly limiting employee access to personal information
  • Regularly conducting security audits and vulnerability scans
  • Minimizing data collection and storage time

However, please note that no method of internet transmission or electronic storage is 100% secure.

Local Storage and Cookies

The Color Lab uses the following local storage technologies:

  • localStorage: Stores your palettes, saved colors, and tool preferences, all data saved on your device
  • Essential Cookies: Maintain basic website functions and session state (if needed)
  • Preference Cookies: Remember your theme and interface preferences

We do not use third-party advertising or analytics cookies. You can manage cookies and local storage through your browser settings, but this may affect some tool functions.

Your Rights

Under applicable privacy laws, you have the following rights regarding your personal information:

  • Right to Access: View the personal information we hold about you
  • Right to Rectification: Request correction of inaccurate or incomplete information
  • Right to Erasure: Request deletion of your personal information
  • Right to Restriction: Restrict information processing in specific circumstances
  • Right to Data Portability: Obtain your data in a structured format
  • Right to Object: Object to data processing based on legitimate interests

To exercise these rights, please contact us through the Contact Us page.

Children’s Privacy

Our service is not directed at children under 13 years of age. We do not knowingly collect personal information from children. If you believe we have inadvertently collected information from a child, please contact us immediately, and we will delete it as soon as possible.

Policy Changes

We may update this Privacy Policy from time to time. Any significant changes will be announced on the website. The updated policy will take effect immediately upon publication. We recommend checking this page regularly for the latest information.

Contact Us

If you have any questions, comments, or suggestions about this Privacy Policy, or wish to exercise your rights, please contact us through the following methods:

Applicable Law

This Privacy Policy is governed by the laws of the People’s Republic of China. We comply with the requirements of the Personal Information Protection Law of the People’s Republic of China, the Cybersecurity Law of the People’s Republic of China, and other relevant laws and regulations.