I don't like the green/blue and purple/blue logos, I think they don't have the right personality to represent the Navajo
coin, that visual with gradients it's very common and can be seen everywhere.
Plus... those colors for me don't express professionality and SAFETY... which are the key points of Navajo.
In fact they express to me just something fresh and playful.

A stronger branding work is needed here. My opinion

Cheers!