The show had already established how Tendi has green blood earlier in the series after an injury and it would have been an easy to infer detail compared to humans in the show.
Other animated shows like Steven Universe already show how non-pink blush colors can work in animation.
Or just tag one of the artists who posts on Mastodon. They’ll get the notification and can decide whether they want to respond here or not.
Vfx head Brian Tatosky did that when I that on another post.
Unfortunately, I can’t recall which of the animators have seen posting on Mastodon.