How to convert the green/red color cod of LefSe cladogram to a blue/red color code ?

Hi all,

By default, all the LefSe cladogram with 2 categories come out with a green/red color code. I would like a blue/red color code to match other of my plots. Do you know how to do it ?

In addition, is it possible to assign the color to a specific category. I mean I think the red is attributed to the first category that come with alphabetical order (e.g., Control : red, Treatment = green). How could I reverse it ?

Thanks very much for your help