Color Contrast Checker
Check foreground/background contrast against WCAG standards with AA/AAA rating.
Aa Contrast sample text
Instructions
사용 방법
❓ FAQ
What is the contrast standard?
WCAG requires 4.5:1 for body text (AA) and 3:1 for large text.
Does it support hexadecimal colors?
Yes, both HEX and RGB color input are supported.
🔗 Related Tools
📝 Related Articles
What Is Image Metadata Viewing? One Article Explains EXIF Information Meaning
After reading this, you will be able to understand what image metadata viewing is, what each EXIF field represents, learn to read shooting time and device parameters locally in the browser, troubleshoot reading errors, distinguish viewing from editing, and judge whether an online tool really does not upload files.
tool-tutorialsJWT Decoder Reports Invalid Token? Common Causes and Troubleshooting
This guide helps you identify JWT decoder error causes in order of frequency, distinguish the boundary between decoding and verification, and master key points for copying and pasting long tokens and on mobile, so invalid token issues in API debugging can be quickly resolved.
tool-tutorialsHow to Use a Currency Converter: A Three-Step Operation Process for Beginners
This article provides executable troubleshooting steps in the order of "environment—input—data," helping you quickly locate issues such as a currency converter not responding, abnormal results, and mobile freezing, and explains the differences between web tools and the system's built-in conversion, so you can solve it yourself without repeatedly going back to the search results page.
tool-tutorialsHow to Convert JSON to CSV: Complete Beginner Steps
Paste JSON of any level into the browser and convert it to CSV. This article provides complete steps for judging the data structure, handling nested fields, troubleshooting conversion failures, dealing with large files, and API debugging, so you can get a usable spreadsheet file without repeated trial and error.