Hi Nohazure, thank you for your patience and understanding. I wanted to let you know that I’ve created and uploaded a new patch update for Tweencel (v2.2.2) to address the color tweening issue on the latest version of Aseprite (v1.3.15).
You can now download the updated version, and it should work smoothly with the new Aseprite release.
Thanks again for your support!