I would like to keep our colors about the same.  I would like to show the customer what we do, perhaps having a guardrail in front of a person who is also tied off to and overhead system above. 

This is the guardrail that we most typically supply:
https://edgefallprotection.com/products/non-penetrating-guardrail/360-mobile-safety-rail/

Here is a link to a good usage of overhead systems in a logo: https://www.google.com/search?q=rigid+rail+lifeline&rlz=1C1CHBF_enUS1017US1017&source=lnms&tbm=isch&sa=X&ved=2ahUKEwib2b6pg8X6AhXmj4kEHafMCBwQ_AUoAXoECAEQAw&biw=1920&bih=929&dpr=1#imgrc=_kdjhIU4B2AemM

EDGE Fall Protection