Rated 5 out of 5 stars

Looks amazing Thank you for your help below!!

This review is for a previous version of the add-on (3.2.3). 

Hi webprod,
As you can see from the screenshots, this is the expected behaviour. If you want, you can change the light grey color (and all the other colors) by editing the root.css file here:
https://github.com/conema/monterail-fulldark/blob/d1c8e3f3e2a6d7bcb477327623311f05cc2b0ad2/content/skin/root.css#L28-L67