Two Key Aspects in Question

As the title preludes, I am questioning two aspects of my story. It is not so much about "Should I put it in here?" but more about, "How can I explain it without being ridiculous?"

I'll give quick details on the story: it is about the afterlife. There are places referred to as "heaven" and "hell," but there is a third called the Agency (name pending.) It is the equivalent of purgatory. The souls here end up guiding the other souls to their respective place in the afterlife and making sure that everyone dies on time.

There is a social hierarchy. At the very top are the seven deaths. Each represents a way of dying. I won't go into detail of each one or the actual plot.

The two aspects are this:

1) I am considering for each Death to have their respective color. For example, one of deaths' color is blue. So not only does she have blue eyes, but most of what she wears is blue. I decided to do this because everyone who works for that Death also wears their color. It is a way to figure out who is working for whom. I thought about using symbols, but I figured that that might be harder to convey/remember.

2) Everyone is sent to work for the Agency adopts some animal characteristics. For example, they can have cat ears/tail or butterfly wings. This is not an attempt to add furries into the novel (in fact the MC makes a joke about it.) The reasoning behind this is because a lot people have a hard time passing over. Some people are comforted by the sight of an animal, especially children. So a person with cat ears/tail are seen as a cat.

I guess my concern is if my explanations are adequate enough. These things won't be explained right away (to avoid info dumping.) I already have the outline ready and the first couple of chapters summarized. I just want to make sure that the aspects aren't silly/stupid.

Thank you for your input.