Flair/Badge for arXiv paper?
I found a service that can create custom badges: shields.io. Using the arXiv background color (Firebrick #B31B1B) I was able to create a badge that looked more or less "official". An example of their template and my specific use case:

http://img.shields.io/badge/&lt;SUBJECT&gt;-&lt;STATUS&gt;-&lt;COLOR&gt;.svg
http://img.shields.io/badge/math.CO-arXiv%3A1408.3644-B31B1B.svg


After converting the svg to png for use on github, I got this: