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Bad Kitty Software is one person, working independently, on software that does exactly what it says. No commissions, no bespoke work, no deadlines set by anyone else. Just good software, made properly.

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What we make

All software is free for non-commercial use. Each release is GPG-signed. Older versions remain available in the library.

Available now

Hue

Not just another HEX picker.

A professional screen colour picker for designers, engineers, architects, and specifiers. Pick any colour from your screen and instantly identify it across twelve colour systems - including professional trade and industry standards that other colour pickers simply do not have.

Linux, Windows and macOS · Lightweight single executable · No dependencies

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Coming soon

PassFORGE

Details coming soon.

The next release from Bad Kitty Software. Details will be published here when it is ready. No release date. No previews. When it is done, it will be here.

Not yet available
Hue - colour picker

Colour Picker for Linux, Windows and macOS

950 colours across 7 palette systems. 12 colour formats. One app.

Features

  • Live screen colour capture with real-time preview and pixel-accurate magnifier
  • 12 colour formats - HEX, RGB, HSL, HSV, CMYK, HTML/CSS Named, RAL Classic, RAL Design, BS4800, BS381C, BS5252, NCS
  • 950 colours across 7 palette systems in the visual Colour Chart Browser
  • Palette Code Search - search any RAL, BS, NCS or CSS colour by code or name
  • Spectrum and Harmony tools - Complementary, Split Complementary, Triadic, Tetradic, Analogous
  • Colour Adjustment - fine-tune colours with per-channel sliders including alpha
  • Session save and restore with optional persistence across launches
  • Named colour collections - assign names to captured colours
  • Export - GPL (GIMP/Inkscape/Krita), CSS variables, SCSS variables, SVG, PNG, HTML
  • Always on top and adjustable window opacity
  • Dark, Light, and System themes
  • Reassignable hotkeys - capture and undo from the keyboard
  • Lightweight single executable - no Python, no dependencies, just run it

Colour systems included

SystemColoursUsed for
HTML/CSS Named148Web and digital design
RAL Classic217European industrial standard - paints, coatings, plastics
RAL Design69Interior and product design
BS480093UK building and construction paints
BS5252237UK colour coordination framework
NCS95Scandinavian and international interior and architecture
BS381C91UK industrial and military identification colours

Installation

tar -xzf hue-1.0.0-linux-x86_64.tar.gz
cd hue-1.0.0
sudo bash install.sh
Then launch from any terminal with hue, or find Hue in your application menu under Graphics.
Download the Windows installer from the library and run it.
Windows installer coming soon. Check the Software Library for availability.
Download the macOS release from the library.
macOS release coming soon. Check the Software Library for availability.

System requirements

Linux
  • Ubuntu 24.04 or later
  • Requires glibc 2.39+
  • 64-bit
Windows
  • Windows 10 or Windows 11
  • 64-bit only
macOS
  • macOS 11 (Big Sur) or later
Download Hue Read the manual Verify your download
A note on commissions and requests: Bad Kitty Software does not accept commissions, bespoke work, or collaborations of any kind. All software is developed independently to its own schedule. Suggestions and ideas are welcome via the contact page, but cannot be guaranteed to be acted upon. The one exception considered is accessibility improvements for users with disabilities, though this cannot be promised.