There are other clients like ender client and purus pasta, which are maintained. If they are lacking some features that amber had you could contact their developers so maybe they can add some if they feel like it would be useful.
I'm not sure that I have a strong argument against sketch colors - Jorb, November 2019 http://i.imgur.com/CRrirds.png?1 Join the moderated unofficial discord for the game! https://discord.gg/2TAbGj2 Purus Pasta, The Best Client