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Color Converter

Ready to calculate
7 Color Encodings.
Live Swatch Preview.
One-click Copy.
100% Free.
No Data Stored.

How it Works

01Pick Encoding

Name, RGB, Hex, HSL, HWB, CMYK, or NCol

02Enter Values

Just the fields for your chosen encoding

03Press Calculate

Convert to all 7 formats simultaneously

04Copy & Use

One-click copy for any format — Hex, RGB, HSL, etc.

What is a Color Converter?

The Color Converter translates between the 7 most common color encodings used across web, design, and print: Name (HTML/CSS named colors), RGB, Hexadecimal, HSL, HWB, CMYK, and Natural Colors (NCol). Pick the encoding you have, type your color, press Calculate — the tool produces all 7 forms simultaneously alongside a live swatch preview and one-click copy buttons.

Why so many color encodings? Each one models color from a different angle: RGB matches how monitors mix light (additive). Hex is a compact RGB shorthand for the web. HSL separates hue (color), saturation (vividness), and lightness — making manual color tweaks intuitive for designers. HWB uses hue, whiteness, blackness — a more painterly model. CMYK matches how printers mix ink (subtractive) and is essential for offset/digital print workflows. NCol (Natural Colors) is a newer human-readable notation. Knowing how to translate between them is a daily need for web developers, designers, marketers, illustrators, and anyone working with brand colors.

Built for designers, developers, marketers, illustrators, brand owners, and anyone needing color in a different format. Free, fast, mobile-friendly, fully client-side — your colors never leave your browser.

Pro Tip: Hex (#RRGGBB) is the lingua franca of the web. RGB ↔ Hex is lossless. HSL is the easiest format to tweak — change one of three numbers and you'll know exactly what you're changing.

How to Use the Color Converter?

Choose Color Encoding: Pick from the dropdown — Name, RGB, Hex, HSL, HWB, CMYK, or NCol. The input panel adapts to that encoding's fields.
Enter Your Color: Fill the encoding-specific fields. RGB takes 0–255 per channel · Hex takes #RRGGBB · HSL takes 0–360° hue plus saturation/lightness percentages · etc.
Press Calculate: The tool converts your input to internal RGB, then projects to all 7 formats.
See Live Swatch & All Formats: Result panel shows a large swatch with the hex code overlaid, then every format in copy-ready cards.
Copy What You Need: Click any format's copy button — instant clipboard. Use Hex on the web, CMYK at the printer, HSL when designing.

How do color conversions work?

All conversions go through RGB as the central representation. Once a color is in RGB (three integers 0–255), every other format derives via deterministic math. Hex is just the same bytes in base-16; HSL/HWB/CMYK are mathematical reprojections.

Color space conversions are mostly lossless if you keep enough precision, but quantizing to integer RGB does introduce small rounding errors when you round-trip through HSL/HWB/CMYK. For exact preservation, work in Hex or RGB.

Conversion Formulas — At a Glance:

RGB ↔ Hex (Lossless)

Each RGB byte → 2 hex digits:

  • Hex = "#" + R.toHex(2) + G.toHex(2) + B.toHex(2)
  • 255 → FF, 128 → 80, 0 → 00

Example: rgb(255, 87, 51) → #FF5733.

RGB → HSL

Hue, Saturation, Lightness:

  • L = (max + min) / 2
  • S = depends on max/min/delta
  • H = 60° per RGB sextant

CSS Color Module Level 4 standard. Used by web designers globally.

RGB → HWB

Hue, Whiteness, Blackness:

  • H = same as HSL hue
  • W = min(R,G,B) / 255
  • B = 1 − max(R,G,B) / 255

Painterly model — pure hue diluted with white and darkened with black.

RGB → CMYK

Cyan, Magenta, Yellow, Key (black):

  • K = 1 − max(R,G,B)/255
  • C = (1 − R/255 − K) / (1 − K)
  • M, Y similarly

Subtractive — for ink on paper. Print profiles (ICC) refine the actual color.

When to Use Each Encoding:

Hex (#RRGGBB)

Web standard. Most CSS, HTML, design tools default to it. Compact 6 characters. Lossless RGB shorthand.

Use: web colors, CSS, design specs.

RGB (0-255 × 3)

Direct match for screen pixels. Used in image editors, code libraries, design APIs. Same info as hex, just numeric.

Use: programming, image processing.

HSL (hue, sat, light)

Best for tweaking colors. Want it more vivid? Bump S. Brighter? Bump L. Different shade? Adjust H.

Use: design, color theming, manual adjustments.

HWB (hue, white, black)

Painterly: pure hue + whiteness + blackness. Recently added to CSS Color Module 4. Intuitive for tints/shades.

Use: tinting/shading workflows.

CMYK (% × 4)

Subtractive — ink on paper. Required for offset printing. Math-only here; real print needs ICC profile + paper choice.

Use: print, packaging, brochures.

NCol (Natural Colors)

Hue letter (R Y G C B M) + percent + whiteness/blackness percents. Human-readable. Newer standard.

Use: cross-cultural color naming, accessibility.

Real-World Example

Common Colors Across All 7 Encodings

Common colors and their values across all 7 encodings:

Color Hex RGB HSL CMYK NCol
Pure red#FF0000255, 0, 00°, 100%, 50%0%, 100%, 100%, 0%R0, 0%, 0%
Pure green#00FF000, 255, 0120°, 100%, 50%100%, 0%, 100%, 0%G0, 0%, 0%
Pure blue#0000FF0, 0, 255240°, 100%, 50%100%, 100%, 0%, 0%B0, 0%, 0%
Hot pink#FF69B4255, 105, 180330°, 100%, 71%0%, 59%, 29%, 0%M50, 41%, 0%
Navy#0000800, 0, 128240°, 100%, 25%100%, 100%, 0%, 50%B0, 0%, 50%
White#FFFFFF255, 255, 2550°, 0%, 100%0%, 0%, 0%, 0%R0, 100%, 0%

Notice white in CMYK is 0% of all inks (because CMYK adds ink for darker — "white" is unprinted paper). And note how the same color appears completely different across encodings — knowing all of them lets you talk to designers, developers, and printers in their own language.

Who Should Use the Color Converter?

1
🎨 Web Designers & Developers: Convert design hex codes to RGB / HSL for CSS variables, Tailwind tokens, or design systems.
2
🖨️ Print & Branding Pros: Translate brand RGB to CMYK for offset printing — and verify the K (black) component for printer-friendly designs.
3
📱 UI / UX Designers: Use HSL to systematically tweak color schemes — change saturation across an entire palette.
4
🎯 Marketers & Brand Managers: Match colors across web, social, print, and merchandise — different platforms need different formats.
5
🧑‍🏫 Students & Educators: Learn color theory by seeing how the same color shifts numerically across HSL, HWB, CMYK.
6
♿ Accessibility & Design Engineers: Quickly check hex / RGB to evaluate against WCAG contrast ratios in other tools.

Technical Reference

Key Takeaways

Color encoding is a small but daily friction point — designers think in HSL, developers code in Hex, printers need CMYK, and brand decks scatter all three. Use the ToolsACE Color Converter to translate seamlessly between any of 7 encodings. Pick your input format, enter the color once, press Calculate, and copy whatever output you need. Live swatch preview confirms you're working with the color you intended; one-click copy speeds up every workflow that involves color.

Frequently Asked Questions

What is the Color Converter?
The Color Converter translates between 7 color encodings: Name (HTML/CSS named colors), RGB (0-255 × 3), Hexadecimal (#RRGGBB), HSL (Hue/Saturation/Lightness), HWB (Hue/Whiteness/Blackness), CMYK (Cyan/Magenta/Yellow/Key), and NCol (Natural Colors notation). Pick an input encoding, enter your color, press Calculate, and the result panel shows all 7 formats with one-click copy buttons plus a live swatch preview.

Under the hood, the tool first converts any input to RGB (the central representation), then projects from RGB to every other encoding using standard mathematical formulas. RGB ↔ Hex is lossless; HSL/HWB/CMYK round-trips are accurate to within ±1 due to integer rounding.

Built for designers, developers, print/branding professionals, marketers, and anyone needing colors across multiple formats.

How do I convert RGB to Hex?
Convert each of the three RGB channels (0–255) to two-digit hex, then concatenate with a leading #. Example: rgb(255, 87, 51) → 255 = FF, 87 = 57, 51 = 33 → #FF5733. JavaScript: (255).toString(16).padStart(2, "0"). The conversion is fully lossless in both directions.
How do I convert Hex to RGB?
Take a #RRGGBB hex code and parse each pair as base-16. Example: #FF5733 → FF = 255, 57 = 87, 33 = 51 → rgb(255, 87, 51). Three-digit shorthand (#F53) expands to #FF5533 — each digit is doubled. The tool accepts both 3- and 6-digit hex with or without the leading #.
What's the difference between RGB, HSL, and HWB?
RGB defines color by mixing three lights — red, green, blue (0-255 each). Direct hardware mapping. HSL defines color by Hue (which color, 0-360°), Saturation (how vivid, 0-100%), and Lightness (how bright, 0-100%) — easier to tweak. HWB uses Hue plus Whiteness (white added) and Blackness (black added) — a painterly model. All three describe the same color, just from different perspectives.
What's CMYK and why is it different from RGB?
CMYK is a subtractive color model — used in printing where ink absorbs (subtracts) light. C/M/Y/K = Cyan, Magenta, Yellow, Key (black). Higher CMYK = more ink = darker color. RGB is additive — used on screens where light is mixed. The two cover overlapping but different gamuts; some bright RGB colors can't be reproduced in CMYK ("out of gamut").
Why does my CMYK look different in print?
Mathematical CMYK conversion gives you a starting point, but actual print color depends on: paper type (gloss, matte, uncoated), printer model + ink (every printer has a unique color profile), ICC profiles (the standard for color-managed workflows), and ambient lighting when viewing. For exact print colors, ask your printer for their preferred ICC profile and apply it in your design software.
What are HTML named colors?
Standard CSS-defined color names — about 140 of them — like red, blue, hotpink, navy, lightseagreen, etc. The browser maps each name to a fixed RGB value. Use them when readability matters more than precision; use hex/RGB when you need exact brand colors.
What's NCol (Natural Colors)?
NCol is a relatively new color notation designed to be human-readable. Format: <letter><pct>, <whiteness%>, <blackness%>. The letter is one of R, Y, G, C, B, M (red, yellow, green, cyan, blue, magenta — 60° apart on the color wheel). The percent shows progress to the next letter. Example: R30 = 30% from red toward yellow = orange-red.
Are conversions lossless?
RGB ↔ Hex: fully lossless. RGB ↔ HSL/HWB/CMYK: mathematically lossless in continuous space, but quantizing to integer RGB introduces ±1 rounding errors. For exact preservation across multiple conversions, work in floating-point Hex/RGB.
Can I use this for accessibility / WCAG contrast?
Use this tool to get the hex codes, then check them in a dedicated WCAG contrast checker. WCAG AA requires 4.5:1 contrast for normal text, 3:1 for large text. WCAG AAA requires 7:1 and 4.5:1 respectively. Most browsers' DevTools include built-in contrast pickers as well.
What's the difference between sRGB and other RGB color spaces?
Most web colors are sRGB — the standard color space used by virtually all displays, browsers, and digital cameras. Other spaces (Adobe RGB, Display P3, Rec. 2020) cover wider gamuts but require modern browsers and color-managed workflows. This calculator works in sRGB by default — sufficient for 99% of web/design work.
Is my data private?
All conversions happen locally in your browser. Nothing is sent to a server, saved, or logged. The tool is free and requires no sign-up.

Author Spotlight

The ToolsACE Team - ToolsACE.io Team

The ToolsACE Team

Our math tools team implements the standard color-space conversion formulas — RGB ↔ Hex (lossless), RGB ↔ HSL (CSS Color Module Level 4), RGB ↔ HWB, RGB ↔ CMYK (subtractive print model), and NCol (Natural Colors notation). Each conversion is reversible within rounding precision.

CSS Color Module 4ICC Color SpacesSoftware Engineering Team

Disclaimer

CMYK output is a math-only conversion — actual printed colors depend on paper, ink, and printer profile (ICC). For exact print-ready colors, consult your printer's color-managed workflow. RGB/HSL/HWB are display-accurate within sRGB.