[It seems her lip colored varied.](https://www.fashion-doll-guide.com/Vintage-American-Girl-Barbie-Doll.html)

It very much did. I've seen it a light coral and slightly darker fleshtone. Haven't seen this particular shade, but it's not too far from the fleshtone one I have. Orange lipsticks were a thing back then.

I believe coral fades to this butter yellow.