HexaCalc
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Pick Hex color pickerColor picker from imagePalette from imageCamera color identifierScreen color picker
Create Palette generatorColor wheelComplementary colorsTriadic colorsMonochromatic schemeColor mixerBrownBlueGreenPurplePinkOrangeGrayColor matcherGradient generatorTailwind color generatorShades and tintsRandom color generatorPaint color visualizerWebsite color schemesColor mixing chart
Check Contrast checkerColor blindness simulatorColor blind testTypes of color blindnessHue test
Convert HEX to RGBRGB to HEXRGB to CMYKCMYK to RGBHEX to CMYKHEX to HSLColor converterColor temperatureColor name finder
Personal color Color analysisSkin tone chartSeasonal color quizWinterAutumnSpringLight SpringTrue SpringBright SpringLight SummerTrue SummerSoft SummerSoft AutumnTrue AutumnDeep AutumnDeep WinterTrue WinterBright Winter
Color families Color codesBlueGreenSage greenMauveRedPinkPurplePastelNeutralDarkGoldGrayMint greenLight greenLight purpleLime greenPastel pinkNeonPastel greenPastel yellowPeachCrimsonCool colorsBurnt orangeOrangeGreigeBright colorsSpring colorsTealNavy blueBurgundyCoralLavenderBeigeMaroonOlive greenTurquoiseEmerald greenBrownYellowTerracottaDusty roseCreamMustard yellowForest greenBaby bluePeriwinkleMagenta
Hex math Hex calculatorHex to decimalDecimal to hexHex to binaryBinary to hexHex to textText to hex
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About HexaCalc

HexaCalc is a small, independent website of color tools built around the six-digit hex code. It started life on this domain as a general calculator site; in October 2026 it was rebuilt from scratch to do one thing properly: color.

What we are trying to do

Most color sites either give you a lookup table or hide the useful tools behind a subscription. We want the everyday jobs, like reading a color off a photo, checking text contrast, converting a code for print or seeing a palette through color-blind eyes, to be free, fast and honest about their limits.

How the tools work

Every calculation runs in your browser in a few kilobytes of JavaScript. Nothing you load, photograph or paste is sent to us. The math follows published standards so you can check it:

  • sRGB, Lab, LCH, OKLab and OKLCH conversions follow the CSS Color Module Level 4 formulas, including the D65 to D50 Bradford adaptation for Lab.
  • Contrast ratios use the WCAG 2.2 relative luminance definition. APCA values use the APCA-W3 0.0.98G constants and are shown for information only, because APCA is not yet part of any WCAG version.
  • Color differences use CIEDE2000.
  • Color vision simulation uses the matrices published by Machado, Oliveira and Fernandes in 2009.
  • Paint-style mixing uses the open-source spectral.js library (MIT license), which applies Kubelka-Munk theory.
  • Color names come from the meodai/color-names list (MIT license) and the 148 CSS named colors.

Who is behind it

HexaCalc is run by a small independent team that builds and maintains a handful of free web tools. We do not list made-up staff, invented credentials or stock-photo editors. When a page needs an expert, such as a future guide to color theory or a reviewer for the vision screening tests, it will name a real person with real credentials, or it will not be published.

How we use AI

We use AI coding and writing assistants while building the site. Every formula is checked against its published source, and the copy is edited by people who use these tools themselves. No page is published only to rank in search, and no tool claims more accuracy than its method supports.

Health-related tools

The color blind test and hue test are screening exercises, not medical tests. Screens, lighting and viewing distance all change the result. If you are worried about your color vision, see an optometrist or ophthalmologist.

Money

HexaCalc is paid for by Google AdSense ads placed below the tools, never over them. Every tool is free to use, with no account and nothing to install.

Corrections

If a number looks wrong, tell us. Email [email protected] with the page, the input you used and what you expected. We fix confirmed errors quickly.