Color Converter Online — Free HEX, RGB, HSL, oklch, CMYK & Tailwind Color Tool

How to Color Converter Online

1. 1

   Enter a color in any format — HEX, RGB, HSL, oklch, CMYK, a CSS named color, or a Tailwind class — into the input field, or use the visual color picker.

2. 2

   The tool automatically detects the input format and converts to all 16+ output formats instantly.

3. 3

   Click any format row's Copy button to copy that specific value to your clipboard.

4. 4

   Switch to Palette mode to generate color harmonies — complementary, analogous, triadic, split-complementary, tetradic, or monochromatic.

5. 5

   Use Contrast mode to check WCAG 2.1 AA/AAA compliance between your color and any background color. View color blindness simulations.

6. 6

   Use Blend mode to mix two colors in perceptually uniform oklab space. Adjust the ratio slider for precise mixing.

7. 7

   Generate shades (darker) and tints (lighter) variations using the Shades & Tints mode.

Color Converter Features

• ✓

  16+ color format support: HEX (3/4/6/8 digit), RGB, RGBA, HSL, HSLA, HSB/HSV, HWB, CMYK, oklch, oklab, CIELAB, CIELCh, Display P3, CSS named colors, Android ARGB, Swift UIColor, and decimal integer.

• ✓

  Auto-detection: paste any color format and the tool automatically identifies and converts it.

• ✓

  oklch and oklab support: modern perceptually uniform color spaces used by Tailwind CSS v4, iOS 17+, and CSS Color Level 4.

• ✓

  Display P3 wide-gamut color output for Apple devices and HDR displays.

• ✓

  Tailwind CSS class mapping: finds the nearest Tailwind color class for any input color.

• ✓

  Visual HSL color picker with saturation/brightness gradient area, hue slider, and alpha slider.

• ✓

  EyeDropper API integration: pick any color from your screen (Chrome and Edge).

• ✓

  WCAG 2.1 contrast ratio checker with AA, AA Large, AAA, and AAA Large compliance badges.

• ✓

  APCA contrast (Advanced Perceptual Contrast Algorithm) for WCAG 3.0 draft readiness.

• ✓

  Color blindness simulation: preview how colors appear under protanopia, deuteranopia, tritanopia, and other color vision deficiencies.

• ✓

  Color harmony generator: complementary, analogous, triadic, split-complementary, tetradic, and monochromatic palettes in oklch space.

• ✓

  Color blending in perceptually uniform oklab space with configurable ratio.

• ✓

  Shades and tints generator: create darker and lighter variations with configurable step count.

• ✓

  Per-format copy buttons: click-to-copy any specific format value.

• ✓

  CSS Variables output: generates --color-r, --color-g, --color-b CSS custom properties.

• ✓

  Cross-platform output: Android ARGB integer, Swift UIColor constructor, decimal integer.

• ✓

  Shareable URLs: encode your color and settings in the URL for sharing with teammates.

• ✓

  Works entirely in your browser — no color data is ever sent to any server. Your data stays completely private.

• ✓

  Keyboard shortcuts for power users: ⌘↵ to convert, ⌘⇧P for palette, ⌘⇧A for contrast, ⌘⇧B for blend.

Frequently Asked Questions

Is this color converter free?

Yes, DevFlow Color Converter is completely free with no usage limits. All conversion, palette generation, contrast checking, and blending runs directly in your browser — no account required.

Is my data safe?

All processing happens entirely in your browser using pure JavaScript. No color data is ever transmitted to a server or stored anywhere outside your browser. Your data stays completely private.

What is oklch and why should I use it?

oklch (OK Lightness Chroma Hue) is a perceptually uniform color space standardized in CSS Color Level 4. Unlike HSL, oklch ensures that two colors with the same lightness value actually appear equally bright to the human eye. This makes it ideal for design systems, generating accessible color palettes, and maintaining consistent perceived contrast. Tailwind CSS v4 uses oklch as its default color space.

What is the difference between HSL and HSB/HSV?

Both HSL and HSB/HSV use hue and saturation, but they differ in the third component. HSL's Lightness goes from black (0%) through the pure color (50%) to white (100%). HSB's Brightness goes from black (0%) to the full-saturation color (100%). HSB is commonly used in design tools like Figma and Photoshop, while HSL is the CSS standard.

What is Display P3?

Display P3 is a wide-gamut color space that contains about 25% more colors than standard sRGB. It is used by Apple devices (iPhone, Mac, iPad), HDR displays, and is supported in CSS via the color(display-p3 ...) function. Colors outside the sRGB gamut appear more vibrant on P3-capable screens.

How does the WCAG contrast checker work?

The WCAG 2.1 contrast checker calculates the luminance contrast ratio between your foreground and background colors using the WCAG algorithm. A ratio of 4.5:1 or higher passes AA for normal text, 3:1 passes AA for large text, and 7:1 passes AAA for normal text. The tool also shows APCA contrast values used in the WCAG 3.0 draft.

What is perceptual color blending?

Blending colors in the oklab color space produces more natural-looking gradients than blending in sRGB. In sRGB, mixing blue and yellow produces a muddy gray, but in oklab, the same mix produces a vibrant green — because oklab is designed to match human color perception. The blend mode lets you choose between oklab, sRGB, and HSL blending.

How does Tailwind class mapping work?

The tool compares your input color against all 220+ default Tailwind CSS color classes (50–950, plus black and white) using the CIEDE2000 color difference formula. The perceptually closest Tailwind class is shown. This is useful when you have a specific brand color and want to find the nearest Tailwind utility class.

What is color blindness simulation?

The simulator uses scientifically validated matrices (Brettel/Viénot/Mollon) to approximate how colors appear to people with color vision deficiencies. Protanopia and deuteranopia affect red-green discrimination, tritanopia affects blue-yellow, and achromatopsia is total color blindness. This helps designers verify that their color choices are accessible to all users.

Can I pick a color from my screen?

Yes, on supported browsers (Chrome 95+, Edge 95+). Click the eyedropper button to activate the EyeDropper API, which lets you sample any pixel color on your screen. The picked color is instantly loaded into the converter. Firefox and Safari do not yet support this API.

What are color harmonies?

Color harmonies are sets of colors that are aesthetically pleasing when used together, based on their position on the color wheel. Complementary colors are opposite (180°), analogous are adjacent (±30°), triadic are equally spaced (120°), and tetradic form a rectangle. The tool generates harmonies in oklch space for perceptual uniformity.

Does it work offline?

Yes. All color math is implemented in pure JavaScript with zero external API calls. Once the page has loaded, the Color Converter works without an internet connection.

Related Developer Tools

• Hash GeneratorGenerate and verify cryptographic hashes with multiple algorithms.
• SVG OptimizerOptimize, minify, and clean SVG files with configurable SVGO presets.
• JSON FormatterPrettify, minify, and validate JSON data instantly.
• Base64 Encode/DecodeEncode and decode Base64 strings, files, and data URIs instantly.