I'm trying to find out how to color my buttercream guava color for an order and can't seem to find any

color chart with that specific color on it. Has anyone make this color before or knows how to get it right?

Thank you all in advanced! :)

Assuming you mean the ones that are the pinkish color inside.. ? That's the most common.

I would say you need to experiment a little... try pink and a teeny amount of orange. Maybe the wilton rose color with a little of orange and maybe even a smidge of yellow, you're just going to have to use several bowls, and keep changing what color and how much you add until you get it right.