The most quick solution is reinstalling Adobe XD. If not please log a bug here adobexd.uservoice.com/
Could you please check the memory leak when the color picker tool is missing.
That's strange. Can you let us know the version of Adobe XD that you are using? From what you say, you must be using the latest version but I am trying to be sure.
Thanks for all your answers.
When I posted the question, I was just doing the tutorial. Yesterday, I started my first original design and the color picker was there. Today, I reopended the tutorial and the color picker has also now appeared. I haven't done any repair or reinstallation.
Version is 188.8.131.52 (Starter).
Thank you for sharing the update, and glad to hear that you are all set. I am still not sure as to why you weren't able to see it before. Hopefully, someone here has a better idea.
Got this issue as well, hopefully it goes away the same way
Color picker is really behaving odd, as I am working on projects and sometimes the picker appears and sometimes not, please fix these issues asap.