Custom theme for specific visuals of the same type

Hi there,

I wanted to ask does anyone know if this is possible?

I have one report that I would like to brand differently depending on the user (we would be using embedding to select 1 of 2 JSON Theme files). The only part of the report I want to change is the colours of 2 buttons.

Is it possible to do this with a custom JSON theme? I know how to change the colour of all buttons using a custom theme but not individual buttons.

Green User

Red User

Many thanks.