Noto Emoji Color fontconfig for Konsole

99-noto-mono-color-emoji.conf

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<!--
Noto Mono + Color Emoji Font Configuration.

Currently the only Terminal Emulator I'm aware that supports colour fonts is Konsole.

Usage:
0. Ensure that the Noto fonts are installed on your machine.
1. Install this file to ~/.config/fontconfig/conf.d/99-noto-mono-color-emoji.conf
2. Run `fc-cache`
3. Set Konsole to use "Noto Mono" as the font.
4. Restart Konsole.
-->
<fontconfig>
  <match>
    <test name="family"><string>Noto Mono</string></test>
    <edit name="family" mode="prepend" binding="strong">
      <string>Noto Color Emoji</string>
    </edit>
  </match>
</fontconfig>

Using this 99-noto-mono-color-emoji.conf, not all my emojis are color in Konsole:

Also, setting the Konsole font to "Noto Mono" doesn't seem necessary. It was set to Hack in the above image.

The reason why some of the emojis don't work for abcfy2 is because it's not handling the multi-code emojis (called grapheme clusters, or zwj sequence). For example LGBT flag 🏳️‍🌈: looks like this in konsole: 🏳<fe0f><200d>🌈
The empty flag + <fe0f> the 16th 'variation selector' character (indicating color, I believe) + <200d> is the zero width joiner + rainbow

How to fix it, I don't know.

This distorted my terminal default font too, making it appear shorter and wider. Removing the binding="strong" from the original example worked for me.

As noted in some comment above, I also swapped the Noto Mono for my konsole's monospace.

Thanks a bunch!