Color Format Converter

Convert colors between HEX, RGB, HSL, and CMYK formats instantly. Free web design tool.

Enter Color (HEX or RGB)

Color Format Converter

Convert colors between HEX, RGB, HSL, and CMYK formats instantly. Free web design tool.

Key Capabilities

Converts between HEX, RGB, HSL, HSV, and CMYK

Enter a value in any format and all other representations update simultaneously.

Visual colour picker

An interactive colour picker canvas lets you select colours visually and see all format values update in real time.

Accessibility contrast checker

Enter a foreground and background colour to calculate the WCAG contrast ratio between them.

How to Use

Enter your colour in any format

Type a colour value in HEX, RGB, or HSL. All other format fields update immediately.

Check the converted values

All format representations are displayed simultaneously. Copy the value you need.

Optionally run the contrast check

Enter a second colour to check the WCAG ratio for foreground/background accessibility.

Common Use Cases

Web developers implementing brand colour palettesA developer who receives brand colours in CMYK can convert each value to HEX for CSS use.
UI designers checking accessibilityA product designer can check whether a text-on-background colour combination meets WCAG AA standards.
Print designers converting digital coloursA graphic designer can convert RGB values to CMYK for print production.

Frequently Asked Questions

What color formats does it support?

The tool converts between HEX (#FF5733), RGB (rgb(255, 87, 51)), HSL (hsl(11, 100%, 60%)), and CMYK (0, 66, 80, 0) formats. Simply enter a color in any format and get instant conversions to all other formats.

Who uses this tool professionally?

Web designers convert design tool colors (HEX) to CSS-compatible formats (RGB, HSL). Print designers convert screen colors (RGB) to print-ready CMYK values. Brand managers ensure consistent color codes across web, mobile, and print style guides.

Why convert between color formats?

Different contexts require different formats: HEX for CSS shorthand, RGB for JavaScript canvas operations, HSL for intuitive color adjustments (changing lightness/saturation), and CMYK for print production. Having all formats available ensures consistency across mediums.

Is my data kept private?

Yes. All color conversion happens locally in your browser. No data is sent to any server.

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Developer Utilities — Data Format Conversion and Encoding

Understanding Data Serialization Formats

Software developers frequently work with structured data formats like JSON (JavaScript Object Notation), CSV (Comma-Separated Values), XML (Extensible Markup Language), and YAML (YAML Ain't Markup Language). Each format has different strengths: JSON is the standard for web APIs and configuration files. CSV is universally supported by spreadsheet applications. XML is used in enterprise systems and document formats. YAML is popular for human-readable configuration. Our conversion tools transform data between these formats instantly, handling edge cases like nested objects, special characters, and encoding differences.

Cryptographic Hash Functions

Hash functions like MD5, SHA-1, SHA-256, and SHA-512 convert any input data into a fixed-length string of characters called a hash or digest. These functions are one-way — you cannot reverse-engineer the original input from the hash. They are used for password storage, data integrity verification, digital signatures, and file deduplication. SHA-256 is the current standard for security-sensitive applications. MD5 and SHA-1 are considered cryptographically broken for security purposes but are still useful for checksums and non-security applications. All our hash generators run entirely in your browser — your data is never transmitted.

Text Encoding and Character Sets

Computers store text as numbers. ASCII maps 128 characters (English letters, digits, basic punctuation) to numbers 0-127. Unicode extends this to over 140,000 characters covering virtually every writing system on Earth. UTF-8 is the dominant encoding on the web, using 1-4 bytes per character. Base64 encoding converts binary data (like images or files) into a text-safe format using 64 printable ASCII characters. URL encoding replaces special characters with percent-encoded equivalents for safe transmission in web addresses. Our encoding tools handle all these transformations with proper error handling for malformed input.

Privacy for Developer Tools

All DoctorDocs developer tools process your data entirely in your browser using JavaScript. No API calls, no server uploads, no telemetry. This is critically important for developers working with sensitive data — API keys, database connection strings, configuration secrets, or proprietary code. When you paste a JSON payload to format it, or generate a SHA-256 hash of a password, the data exists only in your browser's memory. Close the tab and it is gone. This makes DoctorDocs developer tools safe to use with production data and secrets.