Extended Color Selector

A powerful color selector for Krita 5.

Features

• Supports color picking in 11 color models. (Gray, SRGB, HSV, HSL, LinearRGB, XYZ, Lab, OkLab, OkLch, OkHsv, OkHsl, Normal(Normal map))
• Support HDR color picking.
• Integrated with color management from Krita. Display the correct color under specific color profile.
• Fully modular, and highly customizable.
  • Three wheel shapes: square, triangle, and circle.
  • Channel sliders and ring to modify the third channel.
  • Swappable and revertable axes.
  • Color picker rotate with ring.
  • Scale to fit SRGB gamut for color models in CIE color space.
• Portable color selector. Open the selector at anywhere on canvas using shortcut.
• Shift and Alt modifiers to shift slowly.
• Out of gamut hinting.

Known issues

• YCbCr color space layers/images causes crash.
• Performance issue when altering primary channel if HDR is used, really, really, reeeeeeeeeeally lag.
• Alias issue on visual selector image.
• Clipping to SRGB gamut looks weird under Grayscale color space.

How to use

Go to Releases, download the latest package.

Go to you Krita preference directory, which is, by default,

• $HOME/.local/share/krita/ for Linux
• %APPDATA%\krita\ for Windows
• ~/Library/Application Support/Krita/ for macOS

Unzip the plugin package into pykrita folder. So there will be one more extended_color_selector.desktop and extended_color_selector inside pykrita.

Launch Krita.

Go to Settings -> Configure Krita -> Python Plugin Manager, find Extended Color Selector, enable it, and restart Krita.

Why the name

To make it looks/sounds like a native Krita docker, just like wide-gamut color selector and advanced color selector.

How to build

First, you need to follow Building Krita from Source page from Krita manual, and build Krita successfully.

Then, clone this repository into krita/plugins/ folder.

The directory structure of Krita source code should be like this:

krita/
  ├── plugins/
  │    ├── ExtendedColorSelector/   # This repository
  │    ├── CMakeLists.txt   # The CMakeLists.txt you are going to modify
  │    └── ...
  └── ...

Next, open CMakeLists.txt, and add this line after the last add_subdirectory( ... ) line:

add_subdirectory( ExtendedColorSelector )

Finally, build again, and in the install directory, you will find the plugin extended_color_selector.

• On Windows, it should at _install\extended_color_selector
• On Linux, it should at /home/appimage/appimage-workspace/krita.appdir/usr/extended_color_selector inside the container.

It is recommended to create symlinks in pykrita folder to the install folder so you don't need to manually copy after every build.

Screenshots

Credits

Code from extension.py was copied from krita-vision-tools, which is a nice plugin allowing you to select objects with power of neural networks, and modified a little bit.

Most color model conversion functions are translated from Bevy project, in bevy_color rust crate, and under MIT license. It's a very nice open-source game engine written in rust.

ok_color.h downloaded from Björn Ottosson's Blog , and tuned a bit for the project, under MIT license.