Originally, the succulent was the size of my palm. It had been doing great, but after leaving for a few days I came back to find it completely dried out except for the tip which still had a bit of green.
I can't stand when any of my plants die, I feel like I have failed them ☹️. So I took the tip, removed all the dried leaves and placed it in a new pot. The stem was dead too and the plant had zero roots in the middle of summer. I had to spray it with water constantly and be extremely careful until it rehydrated and grew some roots. Took a long time, but I'm glad it's healthy now!
I believe the color change is due to farina. It's a powdery, waxy substance that coats the leaves of succulents:
It serves to protect the plant against external agents like the sun, and it's good indicator of the plant's health.
In the linked article, they actually mention that once farina is removed, it's unlikely to grow back. So I'm glad my plant did eventually get it back! Although I'll admit the green color in the second picture was really pretty too.