Simplifying/Identifying multiple email accounts in Gmail

[whitenack]

Looking for a little guidance in Gmail. I have a work email and a personal email, both of which are google based. I use Gmail on my phone for both accounts, and sometimes there is a little confusion as to which account I am in. It would be great if Gmail could color code the inbox so I would no instantly if I was in one inbox or the other. Anyone heard of such a thing?