how to update the border color for fundamental ngx token component

I am trying to use the fundamental ngx token component (https://sap.github.io/fundamental-ngx/#/core/token) in my angular project. The default border is gray, I want to change it to green. I tried to apply style as follows:

<fd-token class="green-border">Bibendum</fd-token>



.green-border {
border: 2px solid green;
}


But It doesn't work. Please help me. Thank you.

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