Color Converter - HEX, RGB, HSL, CMYK Online Color Tool
Designers and developers often collaborate using different color models: UI designers work in HSL or HEX, frontend developers write CSS rgb() or hex codes, and print teams demand CMYK values. Manually recalculating color coordinates is tedious. This utility provides instantaneous bidirectional conversion across all primary color spaces alongside WCAG contrast evaluation to guarantee accessible UI components.
When to Use This Tool
- CSS Theme Palette Creation: Convert design tokens from Figma (HEX) into CSS variable formats like hsl(var(--primary)).
- Web Accessibility (WCAG) Auditing: Verify that text colors meet WCAG AA (4.5:1) or AAA (7:1) contrast standards against backgrounds.
- Print to Digital Synchronization: Translate print-ready CMYK ink percentages into digital sRGB / HEX equivalents.
- Tailwind CSS Color Extensions: Extract clean RGB channels to implement opacity-friendly Tailwind utility colors.
How to Use
- Pick or Enter Color: Select a color visually via the picker or paste a code (e.g. #3B82F6 or rgb(59, 130, 246)).
- Instant Conversion: Inspect synchronized outputs for HEX, RGB, HSL, HSV, and CMYK.
- Check WCAG Contrast: Review the contrast ratio against black and white text for accessibility compliance.
- Copy CSS Code: Click copy next to any format to paste directly into your CSS or Tailwind stylesheet.
Input & Output Example
Input:
HEX: #3B82F6
Output:
RGB: rgb(59, 130, 246)
HSL: hsl(217, 91%, 60%)
CMYK: cmyk(76%, 47%, 0%, 4%)
WCAG Contrast on White: 3.4:1 (Fail)
WCAG Contrast on Black: 6.2:1 (Pass AA)
Frequently Asked Questions (FAQ)
Q. Why do frontend developers prefer HSL over HEX?
A. HSL (Hue, Saturation, Lightness) aligns intuitively with human perception. Tweaking brightness or creating lighter hover states simply requires adjusting the Lightness percentage (e.g., from 50% to 60%) without altering the base hue.
Q. Can CMYK perfectly represent all RGB colors on screens?
A. No. The RGB color gamut for digital displays is significantly wider than the subtractive CMYK ink gamut used in offset printing. Some vibrant neon blues and greens in RGB cannot be fully reproduced in standard CMYK.
Q. What is the minimum WCAG contrast ratio for body text?
A. Under WCAG 2.1 Level AA, standard body text must achieve a minimum contrast ratio of 4.5:1 against its background. Large text (18pt+ or bold 14pt+) requires at least 3.0:1.
Engineering & Privacy Notes
- Adheres to standard W3C CSS Color Module Level 4 mathematical color conversion formulas.
- Computes relative luminance for WCAG contrast based on the sRGB photometric curve.
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