The code lives in https://github.com/backdrop/backdrop/tree/1.x/core/misc/farbtastic in Backdrop.

The project has not been updated since 2017 (which makes it a potential security risk), and it has been archived for some time now. I was not able to find a maintained fork of it

Our Drupal brethren seem to be looking to remove/replace that library too. Here are some relevant issues from Drupal-land: - Drupal 10 JavaScript dependency plan - Move the Color module to a contributed project when Bartik is deprecated - Implement color changing theme settings for Olivero - https://www.drupal.org/project/color

Here are some articles around the net that compare color-picking solutions: - https://www.dunebook.com/12-best-js-color-picker-libraries (seems to be from 2019) - https://ourcodeworld.com/articles/read/81/top-5-best-javascript-and-jque... (2020) - https://blog.logrocket.com/color-picker-libraries-to-use-in-2021 (2021 as suggested by the article title)

This one comes up a lot (but is in React): https://github.com/casesandberg/react-color / https://casesandberg.github.io/react-color

GitHub Link: 
https://github.com/backdrop/backdrop-issues/issues/5598
GitHub Issue #: 
5598