Free Color Converter Online

Convert HEX, RGB, RGBA, HSL, HSV, CMYK, LAB, LCH, XYZ, HWB, YUV, YIQ and CSS color names instantly, plus a full color picker, palette generator and contrast checker.

Converting colors instantly in your browser…
Color Preview
#DC2626
rgb(220, 38, 38)
hsl(0, 72%, 51%)
Opacity: 100%
Brightness & Contrast
Brightness: —
Relative luminance: —
Contrast vs white / black: —
Nearest CSS name: —

Tip: drag inside the square to set saturation and brightness, drag the hue bar to change color, and use the alpha slider to set transparency — every format below updates in real time.

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Palette Generator

Contrast Checker (WCAG)

Sample Heading Text
The quick brown fox jumps over the lazy dog.
21.00:1

CSS Generator & Export

Color Conversion Tips

01When converting RGB to CMYK for print, always ask your printer for a proof — screen colors and inked colors rarely match exactly, especially with bright saturated colors.
02Use HSL instead of RGB when you need lighter or darker versions of a brand color — keep the hue and saturation the same and only move the lightness value.
03For accessible text, don't rely on color alone — check the WCAG contrast ratio above, and aim for at least 4.5:1 for normal body text.
04Pantone, RAL and NCS matches shown here are nearest approximations — confirm against a physical swatch book before finalizing branding or manufacturing colors.
05Save colors you reuse often to Favorites instead of retyping the HEX code every time — it also survives a page refresh since it's stored locally.

Need to convert another color or build a palette? It only takes a second.

Features

✓20+ color formats: HEX, RGB(A), HSL(A), HSV(A), CMYK, HWB, LAB, LCH, XYZ, YUV, YIQ & more
✓Professional color picker with saturation box, hue and alpha sliders
✓Nearest CSS name, Pantone, NCS and RAL matches
✓Color history and named favorites saved locally
✓8 random color generators including pastel, neon and Material-style
✓11 palette schemes from complementary to monochromatic ramps
✓Built-in WCAG AA/AAA contrast checker
✓Export to CSS, SCSS, LESS, Tailwind config or JSON
✓Shareable link, dark mode, and no sign-up required

A Color Converter Built for Developers, Designers and Printers Alike

Every screen, stylesheet and printer describes color a little differently. A designer hands over a HEX code, a print shop asks for CMYK percentages, an old broadcast spec references YIQ, and a brand guideline lists an official Pantone number — and all of them are describing the same color from a different angle. ToolPlex's color converter reads whatever format you paste in, works out what it is, and instantly shows every other representation side by side, so you never have to look up a conversion formula again.

Unlike single-purpose calculators that only handle one pair of formats, this tool covers the full range used across web development, graphic design, print production and even legacy video engineering, all computed locally in your browser with no server round-trip and no data collected.

Benefits of Using an All-in-One Color Converter

Switching between five different single-format tools costs time and introduces copy-paste errors. Having HEX, RGB, HSL, HSV, CMYK, LAB and the rest calculated from one source value keeps every number consistent, and the built-in history means you can come back to a color you tested ten minutes ago without hunting through browser tabs.

How to Use This Color Converter

Type or paste a color into the input box in any supported format, or use the picker's saturation box and hue slider to choose one visually. Every output format updates instantly below, each with its own copy button. Use the category pills to narrow the view to just web, print, design or broadcast formats, or generate a full palette and check contrast without leaving the page.

Supported Color Formats

Web and CSS: HEX, RGB, RGBA, HSL, HSLA and CSS color names. Print: CMYK. Design and perception-based spaces: HSV/HSVA, HWB, LAB, LCH and XYZ. Broadcast legacy formats: YUV and YIQ. Reference standards: nearest-match Pantone, NCS and RAL. Numeral systems: decimal, binary and octal representations of the packed color value.

Developer Guide

For UI work, HSL is usually the easiest format to reason about because you can hold hue and saturation constant and only vary lightness to build a consistent shade scale for hover, active and disabled states. When working with design tokens, export the current color or palette straight to CSS variables, SCSS, LESS or a Tailwind config snippet from the Export section below, instead of retyping values by hand.

Designer Guide

LAB and LCH are worth learning if you care about perceptual consistency — two colors with the same lightness value in LAB will actually look equally bright to the human eye, which isn't true of RGB or HSL lightness. The Palette Generator's complementary, triadic and analogous schemes are a fast way to explore harmonious color combinations starting from a single brand color.

Printing Guide

CMYK values calculated here are a mathematical approximation of RGB, assuming standard ink behavior. Real printers vary by paper stock, ink type and press calibration, so always request a physical proof for anything beyond casual home printing, and treat the Pantone, NCS and RAL matches as a starting point rather than a final specification.

Accessibility Guide

The Contrast Checker section calculates the WCAG relative luminance and contrast ratio between any two colors and reports pass or fail for AA and AAA at both normal and large text sizes. As a rule of thumb, body text needs at least 4.5:1 contrast, and large or bold headline text can pass at 3:1.

Browser Compatibility

All conversions run on standard JavaScript math and work in every modern browser, on desktop and mobile alike, with no plugins required.

Common Mistakes

A frequent error is assuming HSL "lightness" and perceived brightness are the same thing — a pure yellow and a pure blue can share the same HSL lightness value while looking very different in brightness to the eye. Another common mistake is applying an RGB-to-CMYK conversion and trusting it as print-ready without a proof, or quoting a Pantone match from an on-screen tool as if it were an official color book reference.

Pro Tips

Use the alpha slider to preview how a color will look at different opacities over your actual background before writing the RGBA value into your CSS. When building a palette for a data visualization, the Monochromatic or Tones schemes usually read better than Neon or Triadic combinations, since low-contrast hue differences are easier to compare at a glance.

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Conclusion

Whether you're handing a HEX code to a developer, a CMYK breakdown to a printer, or checking that your text passes WCAG contrast rules, this converter is built to give an accurate answer instantly, entirely inside your browser. Bookmark the page, and every format you need is one paste away.

Frequently Asked Questions