Color Converter & Picker (HEX, RGB, HSL, CMYK)
Instantly convert colors between HEX, RGB, HSL, and CMYK formats, check WCAG 2.1 accessibility contrast ratios, and generate harmonic palettes with one click.
Active Color & Preview
Readability Contrast & WCAG 2.1 Standard
Color Codes & Formats
#3B82F6background-color: #3B82F6;
Color Harmonies & Creative Palettes
Click any shade to load it into the converterHow to convert and harmonize colors between digital screens and print?
In web development and graphic design, color space precision is paramount. RGB and hexadecimal formats operate on additive light synthesis for digital monitors, while offset printing relies on subtractive CMYK ink mixing. Meanwhile, HSL provides an intuitive cylindrical coordinate system that simplifies theme building and hover effects in modern CSS.
Key features of this universal color conversion suite
1. Instant multi-format synchronization
Tweak RGB sliders, adjust HSL degrees, or paste a HEX hash: all companion values, CMYK percentages, and the visual picker update synchronously with zero lag.
2. Real-time WCAG 2.1 accessibility auditing
Instantly check compliance ratios against pure black and white text to ensure your UI elements meet strict AA and AAA accessibility thresholds.
3. One-click harmony generator
Instantly explore complementary contrasts, analogous flows, balanced triadic triads, and monochromatic light scales ready for production stylesheets.
Comparison of color models: Standards, gamuts, and applications
HEX, RGB, HSL et CMYK (Impression)
| Color Model | Synthesis Principle | Value Range | Primary Devices | Recommended Use Case |
|---|---|---|---|---|
| HEX (#RRGGBB) | Additive (Base 16) | #000000 to #FFFFFF | Web, CSS, HTML, SVG | Universal standard for web stylesheets |
| RGB | Additive (Light channels) | 0 to 255 per channel | Displays, Monitors, GPUs | Canvas rendering, digital imaging, WebGL |
| HSL | Cylindrical Coordinate | H: 0-360°, S: 0-100%, L: 0-100% | CSS3, Design Systems | Dynamic UI theming, dark/light variations |
| CMYK | Subtractive (Inks) | 0% to 100% per ink | Offset & Digital Printers | Magazines, packaging, business cards |
Frequently Asked Questions (FAQ) on color codes and conversion
Why do colors look different on screen versus printed paper?
Screens emit light using the additive sRGB color space, which can produce vibrant saturated tones. Print uses subtractive CMYK pigments that absorb light. The CMYK color gamut is smaller than RGB, making neon blues and bright greens impossible to reproduce exactly on paper.
What is the difference between HEX and RGB codes?
HEX is simply base-16 shorthand for RGB channel values. For instance, rgb(59, 130, 246) maps directly to #3B82F6 because decimal 59 equals 3B, 130 equals 82, and 246 equals F6 in hexadecimal notation.
Why do modern web designers favor the HSL color model?
HSL separates color hue (0° to 360°) from saturation and lightness. This enables intuitive color manipulations like darkening a button for an active state simply by adjusting the L value by 10%.
What contrast ratio is required for WCAG compliance?
WCAG 2.1 Level AA requires a minimum contrast ratio of 4.5:1 for body copy and 3:1 for large text (> 18pt). Enhanced Level AAA mandates a strict 7:1 contrast ratio.
About the BenTools Color Converter & Picker
Automated calculation optimization & decision support
Automated optimization: High-performance algorithmic processing running 100% client-side in your browser (zero data transmission to external servers), predictive lossless data reduction, and instant syntax linting.