What is a hex color code?

A hex color code (hexadecimal color code) is a way to represent colors in digital design using six characters that combine numbers (0-9) and letters (A-F). For example, #FF5733 represents a shade of orange-red. Each pair of characters controls red, green, and blue intensity, allowing over 16 million color combinations. Hex codes are the standard format for specifying colors in web design, graphic design, and digital art because they're compact, precise, and universally supported by browsers and design software.

Tool Description

A precise hexadecimal color checker that verifies hex color codes using the Chroma.js library. This hex code checker validates whether your input is a properly formatted hexadecimal color, identifies the specific format type (3, 6, or 8 characters), and provides detailed color information including RGB and HSL values with a live color preview. Use this hex color tester to instantly check hexadecimal color values and ensure they're valid before using them in your projects.

Features

  • Multiple Hex Formats: Validates shorthand hex (#abc), standard hex (#aabbcc), and hex with alpha transparency (#aabbccdd)
  • Real-time Validation: Instant feedback on whether the color code is valid as you type with this hex color code tester
  • Format Detection: Automatically identifies which hex format type is being used
  • Color Information Display: Shows RGB values, HSL representation, and format type for valid colors
  • Visual Color Preview: Live preview swatch showing the actual color
  • Flexible Input: Accepts hex codes with or without the # prefix
  • Error Messages: Clear feedback when invalid formats or values are entered
  • Powered by Chroma.js: Uses professional color manipulation library for accurate validation

Use Cases

  • Web Development: Check hexadecimal color codes before using them in CSS stylesheets
  • Design Systems: Ensure color codes in design tokens and style guides are properly formatted with this hexadecimal color checker
  • Color Palette Verification: Use the hex color tester to verify that all colors in a palette are valid hex codes
  • Code Review: Quickly validate hex color values in pull requests and code changes
  • Brand Guidelines: Verify official brand colors are in correct hexadecimal format using this hex code checker
  • Learning: Understand different hex color formats and how they translate to RGB/HSL
  • Quality Assurance: Test and check hexadecimal color inputs in applications that accept hex values
  • Data Validation: Verify hex color codes in configuration files and databases