Design issues - coloured outline behind div block

Hi there,

I’m working on a new website and am trying to a.) add a color overlay in front of a collection image but it doesn’t seem to work and b.) add an offset div block behind the initial tile as per the below design. I’m sure it’s an easy fix re positioning but I can’t seem to figure it out so any help would be appreciated.

Web link: Webflow - Onyx Website

Design Screenshot:

Here is my site Read-Only: LINK
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