Picture book, for ages ~6-10? I read it at least 20 yrs ago. Fantasy/sci fi. Girl lives in oppressive tribe in desert world. She runs away, crosses desert, almost dies. She has pet with her. Eventually she reaches another civilization. Colors red and green (or blue?) played major role in story.
This one’s mine — I just remembered that I think the girl (and maybe everyone in her tribe?) are shapeshifters who transform into animals at night. By day everyone’s human, by night everyone’s animals.
I think I am also looking for this book! I read it maybe 15 years ago. I remember that the desert was blue at night, and she is taken care of by an old woman who becomes a fox.
Perhaps not, actually. A friend just helped me locate my book called the Red Sun Girl by Jean Marzollo.